56 research outputs found
Measurement of the forward charged particle pseudorapidity density in pp collisions at s=8 TeV using a displaced interaction point
- Author
- Antchev G.INRNE-BAS, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria
- Aspell P.(CERN, Geneva, Switzerland)
- Atanassov I.(CERN, Geneva, Switzerland)
- Avati V.(CERN, Geneva, Switzerland)
- Baechler J.(CERN, Geneva, Switzerland)
- Berardi V.(INFN Sezione di Bari, Bari, Italy)
- Berretti M.(Università degli Studi di Siena and Gruppo Collegato INFN di Siena, Siena, Italy)
- Bossini E.(Università degli Studi di Siena and Gruppo Collegato INFN di Siena, Siena, Italy)
- Bottigli U.(Università degli Studi di Siena and Gruppo Collegato INFN di Siena, Siena, Italy)
- Bozzo M.(INFN Sezione di Genova, Genoa, Italy)
- Brücken E.(Helsinki Institute of Physics, Helsinki, Finland)
- Buzzo A.(INFN Sezione di Genova, Genoa, Italy)
- Cafagna F. S.(INFN Sezione di Bari, Bari, Italy)
- Catanesi M. G.(INFN Sezione di Bari, Bari, Italy)
- Covault C.(Department of Physics, Case Western Reserve University, Cleveland, OH, USA)
- Csanád M.(MTA Wigner Research Center, RMKI, Budapest, Hungary)
- Csörgő T.(MTA Wigner Research Center, RMKI, Budapest, Hungary)
- Deile M.(CERN, Geneva, Switzerland)
- Doubek M.(Czech Technical University, Prague, Czech Republic)
- Eggert K.(Department of Physics, Case Western Reserve University, Cleveland, OH, USA)
- Eremin V.(Ioffe Physical-Technical Institute of Russian Academy of Sciences, St. Petersburg, Russia)
- Ferro F.(INFN Sezione di Genova, Genoa, Italy)
- Fiergolski A.(INFN Sezione di Bari, Bari, Italy)
- Garcia F.(Helsinki Institute of Physics, Helsinki, Finland)
- Georgiev V.(University of West Bohemia, Plzen̆, Czech Republic)
- Giani S.(CERN, Geneva, Switzerland)
- Grzanka L.(AGH University of Science and Technology, Kraków, Poland)
- Hammerbauer J.(University of West Bohemia, Plzen̆, Czech Republic)
- Heino J.(Helsinki Institute of Physics, Helsinki, Finland)
- Hilden T.(Helsinki Institute of Physics, Helsinki, Finland)
- Karev A.(CERN, Geneva, Switzerland)
- Kašpar J.(Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic)
- Kopal J.(Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic)
- Kundrát V.(Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic)
- Lami S.(INFN Sezione di Pisa, Pisa, Italy)
- Latino G.(Università degli Studi di Siena and Gruppo Collegato INFN di Siena, Siena, Italy)
- Lauhakangas R.(Helsinki Institute of Physics, Helsinki, Finland)
- Leszko T.(Warsaw University of Technology, Warsaw, Poland)
- Lippmaa E.(National Institute of Chemical Physics and Biophysics NICPB, Tallinn, Estonia)
- Lippmaa J.(National Institute of Chemical Physics and Biophysics NICPB, Tallinn, Estonia)
- Lo Vetere M.(INFN Sezione di Genova, Genoa, Italy)
- Lokajíček M. V.(Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic)
- Losurdo L.(Università degli Studi di Siena and Gruppo Collegato INFN di Siena, Siena, Italy)
- Lucas Rodríguez F.(CERN, Geneva, Switzerland)
- Macrí M.(INFN Sezione di Genova, Genoa, Italy)
- Mercadante A.(INFN Sezione di Bari, Bari, Italy)
- Minafra N.(Dipartimento Interateneo di Fisica di Bari, Bari, Italy)
- Minutoli S.(INFN Sezione di Genova, Genoa, Italy)
- Mäki T.(Helsinki Institute of Physics, Helsinki, Finland)
- Nemes F.(MTA Wigner Research Center, RMKI, Budapest, Hungary)
- Niewiadomski H.(CERN, Geneva, Switzerland)
- Oliveri E.(Università degli Studi di Siena and Gruppo Collegato INFN di Siena, Siena, Italy)
- Oljemark F.(Helsinki Institute of Physics, Helsinki, Finland)
- Orava R.(Helsinki Institute of Physics, Helsinki, Finland)
- Oriunno M.(SLAC National Accelerator Laboratory, Stanford, CA, USA)
- Palazzi P.(Università degli Studi di Siena and Gruppo Collegato INFN di Siena, Siena, Italy)
- Peroutka Z.(University of West Bohemia, Plzen̆, Czech Republic)
- Procházka J.(Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic)
- Quinto M.(INFN Sezione di Bari, Bari, Italy)
- Radermacher E.(CERN, Geneva, Switzerland)
- Radicioni E.(INFN Sezione di Bari, Bari, Italy)
- Ravotti F.(CERN, Geneva, Switzerland)
- Robutti E.(INFN Sezione di Genova, Genoa, Italy)
- Ropelewski L.(CERN, Geneva, Switzerland)
- Ruggiero G.(CERN, Geneva, Switzerland)
- Saarikko H.(Helsinki Institute of Physics, Helsinki, Finland)
- Scribano A.(Università degli Studi di Siena and Gruppo Collegato INFN di Siena, Siena, Italy)
- Smajek J.(CERN, Geneva, Switzerland)
- Snoeys W.(CERN, Geneva, Switzerland)
- Sodzawiczny T.(CERN, Geneva, Switzerland)
- Sziklai J.(MTA Wigner Research Center, RMKI, Budapest, Hungary)
- Taylor C.(Department of Physics, Case Western Reserve University, Cleveland, OH, USA)
- Turini N.(Università degli Studi di Siena and Gruppo Collegato INFN di Siena, Siena, Italy)
- Vacek V.(Czech Technical University, Prague, Czech Republic)
- Welti J.(Helsinki Institute of Physics, Helsinki, Finland)
- Whitmore J.(Department of Physics, Penn State University, University Park, PA, USA)
- Wyszkowski P.(AGH University of Science and Technology, Kraków, Poland)
- Zielinski K.(AGH University of Science and Technology, Kraków, Poland)
- Österberg K.(Helsinki Institute of Physics, Helsinki, Finland)
- Publication venue
- Publication date
- Field of study
The pseudorapidity density of charged particles dN ch /d η is measured by the TOTEM experiment in proton–proton collisions at s=8 TeV within the range 3.9<η<4.7 and -6.95<η<-6.9 . Data were collected in a low intensity LHC run with collisions occurring at a distance of 11.25 m from the nominal interaction point. The data sample is expected to include 96–97 % of the inelastic proton–proton interactions. The measurement reported here considers charged particles with pT>0 MeV/c, produced in inelastic interactions with at least one charged particle in -7<η<-6 or 3.7<η<4.8 . The dN ch /d η has been found to decrease with |η| , from 5.11 ± 0.73 at η=3.95 to 1.81 ± 0.56 at η=- 6.925. Several Monte Carlo generators are compared to the data and are found to be within the systematic uncertainty of the measurement
Evidence for non-exponential elastic proton–proton differential cross-section at low |t| and s=8TeV by TOTEM
- Author
- Antchev G.University of West Bohemia, Pilsen, Czech Republic
- Aspell P.(CERN, Geneva, Switzerland)
- Atanassov I.(University of West Bohemia, Pilsen, Czech Republic)
- Avati V.(AGH University of Science and Technology, Krakow, Poland)
- Baechler J.(CERN, Geneva, Switzerland)
- Berardi V.(Dipartimento Interateneo di Fisica di Bari, Bari, Italy)
- Berretti M.(CERN, Geneva, Switzerland)
- Bossini E.(Università degli Studi di Siena, Gruppo Collegato INFN di Siena, Siena, Italy)
- Bottigli U.(Università degli Studi di Siena, Gruppo Collegato INFN di Siena, Siena, Italy)
- Bozzo M.(INFN Sezione di Genova, Genova, Italy)
- Broulím P.(University of West Bohemia, Pilsen, Czech Republic)
- Buzzo A.(INFN Sezione di Genova, Genova, Italy)
- Cafagna F.S.(INFN Sezione di Bari, Bari, Italy)
- Campanella C.E.(Dipartimento di Ingegneria Elettrica e dell'Informazione – Politecnico di Bari, Bari, Italy)
- Catanesi M.G.(INFN Sezione di Bari, Bari, Italy)
- Csanád M.(Wigner Research Centre for Physics, RMKI, Budapest, Hungary)
- Csörgő T.(Wigner Research Centre for Physics, RMKI, Budapest, Hungary)
- D'Orazio A.(Dipartimento di Ingegneria Elettrica e dell'Informazione – Politecnico di Bari, Bari, Italy)
- De Leonardis F.(Dipartimento di Ingegneria Elettrica e dell'Informazione – Politecnico di Bari, Bari, Italy)
- Deile M.(CERN, Geneva, Switzerland)
- Doubek M.(Czech Technical University, Praha, Czech Republic)
- Eggert K.(Case Western Reserve University, Dept. of Physics, Cleveland, OH, USA)
- Eremin V.(University of West Bohemia, Pilsen, Czech Republic)
- Ferro F.(INFN Sezione di Genova, Genova, Italy)
- Fiergolski A.(INFN Sezione di Bari, Bari, Italy)
- Garcia F.(Helsinki Institute of Physics, Helsinki, Finland)
- Georgiev V.(University of West Bohemia, Pilsen, Czech Republic)
- Giani S.(CERN, Geneva, Switzerland)
- Grzanka L.(AGH University of Science and Technology, Krakow, Poland)
- Guaragnella C.(Dipartimento di Ingegneria Elettrica e dell'Informazione – Politecnico di Bari, Bari, Italy)
- Hammerbauer J.(University of West Bohemia, Pilsen, Czech Republic)
- Heino J.(Helsinki Institute of Physics, Helsinki, Finland)
- Karev A.(CERN, Geneva, Switzerland)
- Kašpar J.(Institute of Physics of the Academy of Sciences of the Czech Republic, Praha, Czech Republic)
- Kopal J.(Institute of Physics of the Academy of Sciences of the Czech Republic, Praha, Czech Republic)
- Kundrát V.(Institute of Physics of the Academy of Sciences of the Czech Republic, Praha, Czech Republic)
- Lami S.(INFN Sezione di Pisa, Pisa, Italy)
- Latino G.(Università degli Studi di Siena, Gruppo Collegato INFN di Siena, Siena, Italy)
- Lauhakangas R.(Helsinki Institute of Physics, Helsinki, Finland)
- Linhart R.(University of West Bohemia, Pilsen, Czech Republic)
- Lippmaa E.(National Institute of Chemical Physics and Biophysics, NICPB, Tallinn, Estonia)
- Lippmaa J.(National Institute of Chemical Physics and Biophysics, NICPB, Tallinn, Estonia)
- Lo Vetere M.(Università degli Studi di Genova, Italy)
- Lokajíček M.V.(Institute of Physics of the Academy of Sciences of the Czech Republic, Praha, Czech Republic)
- Losurdo L.(Università degli Studi di Siena, Gruppo Collegato INFN di Siena, Siena, Italy)
- Lucas Rodríguez F.(CERN, Geneva, Switzerland)
- Macrí M.(INFN Sezione di Genova, Genova, Italy)
- Mercadante A.(INFN Sezione di Bari, Bari, Italy)
- Minafra N.(CERN, Geneva, Switzerland)
- Minutoli S.(INFN Sezione di Genova, Genova, Italy)
- Naaranoja T.(Helsinki Institute of Physics, Helsinki, Finland)
- Nemes F.(Wigner Research Centre for Physics, RMKI, Budapest, Hungary)
- Niewiadomski H.(Case Western Reserve University, Dept. of Physics, Cleveland, OH, USA)
- Oliveri E.(CERN, Geneva, Switzerland)
- Oljemark F.(Helsinki Institute of Physics, Helsinki, Finland)
- Orava R.(Helsinki Institute of Physics, Helsinki, Finland)
- Oriunno M.(University of West Bohemia, Pilsen, Czech Republic)
- Palazzi P.(CERN, Geneva, Switzerland)
- Paločko L.(University of West Bohemia, Pilsen, Czech Republic)
- Passaro V.(Dipartimento di Ingegneria Elettrica e dell'Informazione – Politecnico di Bari, Bari, Italy)
- Peroutka Z.(University of West Bohemia, Pilsen, Czech Republic)
- Petruzzelli V.(Dipartimento di Ingegneria Elettrica e dell'Informazione – Politecnico di Bari, Bari, Italy)
- Politi T.(Dipartimento di Ingegneria Elettrica e dell'Informazione – Politecnico di Bari, Bari, Italy)
- Procházka J.(Institute of Physics of the Academy of Sciences of the Czech Republic, Praha, Czech Republic)
- Prudenzano F.(Dipartimento di Ingegneria Elettrica e dell'Informazione – Politecnico di Bari, Bari, Italy)
- Quinto M.(INFN Sezione di Bari, Bari, Italy)
- Radermacher E.(CERN, Geneva, Switzerland)
- Radicioni E.(INFN Sezione di Bari, Bari, Italy)
- Ravotti F.(CERN, Geneva, Switzerland)
- Robutti E.(INFN Sezione di Genova, Genova, Italy)
- Ropelewski L.(CERN, Geneva, Switzerland)
- Ruggiero G.(CERN, Geneva, Switzerland)
- Saarikko H.(Helsinki Institute of Physics, Helsinki, Finland)
- Scribano A.(INFN Sezione di Pisa, Pisa, Italy)
- Smajek J.(CERN, Geneva, Switzerland)
- Snoeys W.(CERN, Geneva, Switzerland)
- Sodzawiczny T.(CERN, Geneva, Switzerland)
- Sziklai J.(Wigner Research Centre for Physics, RMKI, Budapest, Hungary)
- Taylor C.(Case Western Reserve University, Dept. of Physics, Cleveland, OH, USA)
- Turini N.(Università degli Studi di Siena, Gruppo Collegato INFN di Siena, Siena, Italy)
- Vacek V.(Czech Technical University, Praha, Czech Republic)
- Welti J.(Helsinki Institute of Physics, Helsinki, Finland)
- Wyszkowski P.(AGH University of Science and Technology, Krakow, Poland)
- Zielinski K.(AGH University of Science and Technology, Krakow, Poland)
- Österberg K.(Helsinki Institute of Physics, Helsinki, Finland)
- Publication venue
- Publication date
- Field of study
The TOTEM experiment has made a precise measurement of the elastic proton–proton differential cross-section at the centre-of-mass energy s=8 TeV based on a high-statistics data sample obtained with the β⁎=90 m optics. Both the statistical and systematic uncertainties remain below 1%, except for the t -independent contribution from the overall normalisation. This unprecedented precision allows to exclude a purely exponential differential cross-section in the range of four-momentum transfer squared 0.027<|t|<0.2 GeV2 with a significance greater than 7 σ . Two extended parametrisations, with quadratic and cubic polynomials in the exponent, are shown to be well compatible with the data. Using them for the differential cross-section extrapolation to t=0 , and further applying the optical theorem, yields total cross-section estimates of (101.5±2.1) mb and (101.9±2.1) mb , respectively, in agreement with previous TOTEM measurements
First broadband characterization and redshift determination of the VHE blazar MAGIC J2001+439
- Author
- A. Babic(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- A. Biland(ETH Zurich CH-8093 Zurich, Switzerland)
- A. C. S. Readhead(Cahill Center for Astronomy and Astrophysics California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125)
- A. Carosi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. De Angelis(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- A. Domínguez(Inst. de Astrofísica de Andalucía)
- A. González Muñoz(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Herrero(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- A. La Barbera(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. López-Oramas(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Moralejo(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Niedzwiecki(University of Łódź PL-90236 Lodz, Poland)
- A. Overkemping(Technische Universität Dortmund D-44221 Dortmund, Germany)
- A. Saggion(Università di Padova and INFN I-35131 Padova, Italy)
- A. Sillanpää(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- A. Stamerra(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. Treves(Università dell'Insubria Como, I-22100 Como, Italy)
- B. De Lotto(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- B. Marcote(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- C. Delgado Mendez(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- C. Fruck(Max-Planck-Institut für Physik D-80805 München, Germany)
- C. Schultz(Università di Padova and INFN I-35131 Padova, Italy)
- D. Carreto Fidalgo(Universidad Complutense E-28040 Madrid, Spain)
- D. Dominis Prester(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Dorner(Universität Würzburg D-97074 Würzburg, Germany)
- D. Eisenacher(Universität Würzburg D-97074 Würzburg, Germany)
- D. Elsaesser(Universität Würzburg D-97074 Würzburg, Germany)
- D. F. Torres(Institut de Ciències de l'Espai)
- D. Ferenc(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Garrido Terrats(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- D. Hadasch(Institut de Ciències de l'Espai)
- D. Hildebrand(ETH Zurich CH-8093 Zurich, Switzerland)
- D. Hrupec(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Lelas(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Mazin(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Nakajima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- D. Paneque(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Sobczynska(University of Łódź PL-90236 Lodz, Poland)
- D. Tescaro(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. Bernardini(Deutsches Elektronen-Synchrotron)
- E. Carmona(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- E. Colombo(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. Farina(Università dell'Insubria Como, I-22100 Como, Italy)
- E. Lindfors(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- E. Lorenz(Max-Planck-Institut für Physik D-80805 München, Germany)
- E. Prandini(ETH Zurich CH-8093 Zurich, Switzerland)
- F. Borracci(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. D'Ammando(INAF Istituto di Radioastronomia 40129 Bologna, Italy)
- F. Dazzi(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. Prada(Inst. de Astrofísica de Andalucía)
- F. Spanier(Universität Würzburg D-97074 Würzburg, Germany)
- F. Tavecchio(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- F. Verrecchia(Agenzia Spaziale Italiana)
- F. Zandanel(Inst. de Astrofísica de Andalucía)
- G. Bonnoli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- G. De Caneva(Deutsches Elektronen-Synchrotron)
- G. Maneva(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- H. Kellermann(Max-Planck-Institut für Physik D-80805 München, Germany)
- H. Kubo(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- H. Takami(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- I. Lozano(Universidad Complutense E-28040 Madrid, Spain)
- I. Puljak(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- I. Snidaric(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- J. A. Barrio(Universidad Complutense E-28040 Madrid, Spain)
- J. Aleksić(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Becerra González(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Cortina(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Herrera(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Hose(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Krause(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Kushida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- J. L. Contreras(Universidad Complutense E-28040 Madrid, Spain)
- J. L. Richards(Department of Physics Purdue University, 525 Northwestern Ave, West Lafayette, IN 47907)
- J. M. Miranda(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- J. M. Paredes(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- J. Rico(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Rodriguez Garcia(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Sitarek(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Storz(Universität Würzburg D-97074 Würzburg, Germany)
- J. Thaele(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Frantzen(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Kodani(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Mallot(Deutsches Elektronen-Synchrotron)
- K. Mannheim(Universität Würzburg D-97074 Würzburg, Germany)
- K. Nilsson(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- K. Nishijima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Noda(Max-Planck-Institut für Physik D-80805 München, Germany)
- K. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Satalecka(Universidad Complutense E-28040 Madrid, Spain)
- L. A. Antonelli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. C. Reyes(Physics Department California Polytechnic State University, San Luis Obispo, CA 94307, USA)
- L. Font(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- L. Maraschi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. Takalo(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- M. Doert(Technische Universität Dortmund D-44221 Dortmund, Germany)
- M. Doro(Università di Padova and INFN I-35131 Padova, Italy)
- M. Garczarczyk(Deutsches Elektronen-Synchrotron)
- M. Gaug(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- M. Hayashida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- M. López(Universidad Complutense E-28040 Madrid, Spain)
- M. Makariev(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- M. Mariotti(Università di Padova and INFN I-35131 Padova, Italy)
- M. Martínez(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- M. Meucci(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- M. Palatiello(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Perri(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- M. Persic(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Ribó(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- M. Strzys(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. Teshima(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. Uellenbeck(Technische Universität Dortmund D-44221 Dortmund, Germany)
- M. V. Fonseca(Universidad Complutense E-28040 Madrid, Spain)
- MAGIC Collaboration
- N. Godinović(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- N. Lewandowska(Universität Würzburg D-97074 Würzburg, Germany)
- N. Mankuzhiyil(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- N. Nowak(Max-Planck-Institut für Physik D-80805 München, Germany)
- O. Blanch(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- O. Tibolla(Universität Würzburg D-97074 Würzburg, Germany)
- P. Antoranz(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. Bangale(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Colin(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Da Vela(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. G. Prada Moroni(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- P. Munar-Adrover(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- P. Temnikov(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- P. Vogler(ETH Zurich CH-8093 Zurich, Switzerland)
- R. D. Schwartz(University of Missouri-St. Louis St. Louis, Missouri, USA)
- R. J. García López(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- R. López-Coto(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- R. M. Wagner(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. Mirzoyan(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. Orito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- R. Paoletti(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- R. Reinthal(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- R. Zanin(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- S. Ansoldi(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- S. Bonnefoy(Universidad Complutense E-28040 Madrid, Spain)
- S. Covino(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. Einecke(Technische Universität Dortmund D-44221 Dortmund, Germany)
- S. Lombardi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. N. Shore(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- S. Paiano(Università di Padova and INFN I-35131 Padova, Italy)
- S. Partini(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- S. Preziuso(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- S. R. Gozzini(Deutsches Elektronen-Synchrotron)
- S. Rügamer(Universität Würzburg D-97074 Würzburg, Germany)
- S. Sun(Max-Planck-Institut für Physik D-80805 München, Germany)
- T. Bretz(Universität Würzburg D-97074 Würzburg, Germany)
- T. Hovatta(Cahill Center for Astronomy and Astrophysics California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125)
- T. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- T. Sakamoto(Department of Physics and Mathematics College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara-shi Kanagawa 252-5258, Japan)
- T. Schweizer(Max-Planck-Institut für Physik D-80805 München, Germany)
- T. Steinbring(Universität Würzburg D-97074 Würzburg, Germany)
- T. Surić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- T. Terzić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- T. Toyama(Max-Planck-Institut für Physik D-80805 München, Germany)
- U. Barres de Almeida(Max-Planck-Institut für Physik D-80805 München, Germany)
- U. Menzel(Max-Planck-Institut für Physik D-80805 München, Germany)
- V. Kadenius(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- V. M. Larionov(Isaac Newton Institute of Chile St. Petersburg Branch, St. Petersburg, Russia)
- V. Scalzotto(Università di Padova and INFN I-35131 Padova, Italy)
- V. Scapin(Universidad Complutense E-28040 Madrid, Spain)
- V. Stamatescu(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- W. Bednarek(University of Łódź PL-90236 Lodz, Poland)
- W. Idec(University of Łódź PL-90236 Lodz, Poland)
- W. Max-Moerbeck(National Radio Astronomy Observatory PO Box 0, Socorro, NM 87801)
- W. Rhode(Technische Universität Dortmund D-44221 Dortmund, Germany)
- X. Paredes-Fortuny(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- Y. Konno(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- Publication venue
- Publication date
- Field of study
We aim to characterize the broadband emission from 2FGL J2001.1+4352, which
has been associated with the unknown-redshift blazar MG4 J200112+4352. Based on
its gamma-ray spectral properties, it was identified as a potential very high
energy (VHE; E > 100 GeV) gamma-ray emitter. The source was observed with MAGIC
first in 2009 and later in 2010 within a multi-instrument observation campaign.
The MAGIC observations yielded 14.8 hours of good quality stereoscopic data.
The object was monitored at radio, optical and gamma-ray energies during the
years 2010 and 2011. The source, named MAGIC J2001+439, is detected for the
first time at VHE with MAGIC at a statistical significance of 6.3 {\sigma} (E >
70 GeV) during a 1.3-hour long observation on 2010 July 16. The
multi-instrument observations show variability in all energy bands with the
highest amplitude of variability in the X-ray and VHE bands. We also organized
deep imaging optical observations with the Nordic Optical Telescope in 2013 to
determine the source redshift. We determine for the first time the redshift of
this BL Lac object through the measurement of its host galaxy during low blazar
activity. Using the observational evidence that the luminosities of BL Lac host
galaxies are confined to a relatively narrow range, we obtain z = 0.18 +/-
0.04. Additionally, we use the Fermi-LAT and MAGIC gamma-ray spectra to provide
an independent redshift estimation, z = 0.17 +/- 0.10. Using the former (more
accurate) redshift value, we adequately describe the broadband emission with a
one-zone SSC model for different activity states and interpret the few-day
timescale variability as produced by changes in the high-energy component of
the electron energy distribution
Unprecedented study of the broadband emission of Mrk 421 during flaring activity in March 2010
- Author
- :(Physics Department McGill University, Montreal, Canada)
- :(Università di Padova and INFN Padova, Italy)
- A. Archer(Department of Physics Washington University, St. Louis, USA)
- A. Babic(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- A. Biland(ETH Zurich Zurich, Switzerland)
- A. Boller(ETH Zurich Zurich, Switzerland)
- A. C. Rovero(Instituto de Astronomia y Fisica del Espacio Ciudad Autónoma de Buenos Aires, Argentina)
- A. C. S. Readhead(Cahill Center for Astronomy and Astrophysics California Institute of Technology, Pasadena, USA)
- A. C. Sadun(Department of Physics University of Colorado Denver, Denver, Colorado)
- A. Carosi(INAF National Institute for Astrophysics Rome, Italy)
- A. Cesarini(Department of Physics University of Trento, Trento, Italy)
- A. De Angelis(Università di Udine and INFN Trieste, Udine, Italy)
- A. E. Wehrle(Space Science Institute Boulder, USA)
- A. Falcone(Department of Astronomy and Astrophysics Pennsylvania State University, University Park, USA)
- A. Furniss(Santa Cruz Institute for Particle Physics and Department of Physics University of California, Santa Cruz, USA)
- A. González Muñoz(IFAE Campus UAB, Bellaterra, Spain)
- A. La Barbera(INAF National Institute for Astrophysics Rome, Italy)
- A. Lähteenmäki(Aalto University Metsähovi Radio Observatory Kylmälä, Finland)
- A. López-Oramas(IFAE Campus UAB, Bellaterra, Spain)
- A. McCann(Kavli Institute for Cosmological Physics University of Chicago, Chicago, USA)
- A. Moralejo(IFAE Campus UAB, Bellaterra, Spain)
- A. N. Otte(School of Physics and Center for Relativistic Astrophysics Georgia Institute of Technology, Atlanta, USA)
- A. Niedzwiecki(University of Łód Lodz, Poland)
- A. Overkemping(Technische Universität Dortmund Dortmund, Germany)
- A. P. Marscher(Institute for Astrophysical Research Boston University, Boston, USA)
- A. Pichel(Instituto de Astronomia y Fisica del Espacio Ciudad Autónoma de Buenos Aires, Argentina)
- A. Popkow(Department of Physics and Astronomy University of California, Los Angeles, USA)
- A. Sillanpää(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- A. Stamerra(INAF National Institute for Astrophysics Rome, Italy)
- A. Treves(Università dell'Insubria and INFN Milano Bicocca Como, Italy)
- A. Varlotta(Department of Physics and Astronomy Purdue University, West Lafayette, USA)
- A. Wilhelm(Institute of Physics and Astronomy University of Potsdam, Potsdam-Golm, Germany)
- B. Biasuzzi(Università di Udine and INFN Trieste, Udine, Italy)
- B. De Lotto(Università di Udine and INFN Trieste, Udine, Italy)
- B. Jordan(School of Cosmic Physics Dublin Institute for Advanced Studies, Belfield, Dublin 2, Ireland)
- B. Marcote(Universitat de Barcelona ICC, IEEC-UB, Barcelona, Spain)
- B. McBreen(School of Physics University College Dublin, Dublin, Ireland)
- B. Steinke(Max-Planck-Institut für Physik München, Germany)
- C. A. Johnson(Santa Cruz Institute for Particle Physics and Department of Physics University of California, Santa Cruz, USA)
- C. Delgado Mendez(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, Madrid, Spain)
- C. Fruck(Max-Planck-Institut für Physik München, Germany)
- C. Raiteri(INAF Osservatorio Astronomico di Torino, Pino Torinese, Italy)
- C. Schultz(Università di Padova and INFN Padova, Italy)
- D. A. Morozova(Astron. Inst. St.-Petersburg State University, Russia)
- D. A. Williams(Santa Cruz Institute for Particle Physics and Department of Physics University of California, Santa Cruz, USA)
- D. Dominis Prester(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- D. Dorner(Universität Würzburg Würzburg, Germany)
- D. Eisenacher(Universität Würzburg Würzburg, Germany)
- D. Elsaesser(Universität Würzburg Würzburg, Germany)
- D. F. Torres(ICREA and Institute of Space Sciences Barcelona, Spain)
- D. Galindo(Universitat de Barcelona ICC, IEEC-UB, Barcelona, Spain)
- D. Garrido Terrats(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, Bellaterra, Spain)
- D. Hadasch(Institute of Space Sciences Barcelona, Spain)
- D. Hildebrand(ETH Zurich Zurich, Switzerland)
- D. Hrupec(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- D. Kieda(Department of Physics and Astronomy University of Utah, Salt Lake City, USA)
- D. Lelas(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- D. Mazin(Max-Planck-Institut für Physik München, Germany)
- D. Nakajima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- D. Paneque(Max-Planck-Institut für Physik München, Germany)
- D. Sobczynska(University of Łód Lodz, Poland)
- D. Staszak(Physics Department McGill University, Montreal, Canada)
- D. Tescaro(Inst. de Astrofísica de Canarias Tenerife, Spain)
- E. Bernardini(Deutsches Elektronen-Synchrotron)
- E. Carmona(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, Madrid, Spain)
- E. Collins-Hughes(School of Physics University College Dublin, Dublin, Ireland)
- E. Colombo(Inst. de Astrofísica de Canarias Tenerife, Spain)
- E. de Oña Wilhelmi(Institute of Space Sciences Barcelona, Spain)
- E. G. Larionova(Astron. Inst. St.-Petersburg State University, Russia)
- E. Koptelova(Graduate Institute of Astronomy National Central University, Jhongli, Taiwan)
- E. Lindfors(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- E. Lorenz(Max-Planck-Institut für Physik München, Germany)
- E. Prandini(ETH Zurich Zurich, Switzerland)
- E. Pueschel(School of Physics University College Dublin, Dublin, Ireland)
- E. Roache(Fred Lawrence Whipple Observatory Harvard-Smithsonian Center for Astrophysics, Amado, USA)
- External Collaborators(Università di Padova and INFN Padova, Italy)
- F. Borracci(Max-Planck-Institut für Physik München, Germany)
- F. Dazzi(Max-Planck-Institut für Physik München, Germany)
- F. Spanier(Universität Würzburg Würzburg, Germany)
- F. Tavecchio(INAF National Institute for Astrophysics Rome, Italy)
- G. Bonnoli(INAF National Institute for Astrophysics Rome, Italy)
- G. De Caneva(Deutsches Elektronen-Synchrotron)
- G. Gyuk(Astronomy Department Adler Planetarium and Astronomy Museum, Chicago, USA)
- G. H. Gillanders(School of Physics National University of Ireland Galway, Galway, Ireland)
- G. H. Sembroski(Department of Physics and Astronomy Purdue University, West Lafayette, USA)
- G. Hughes(Deutsches Elektronen-Synchrotron)
- G. Maneva(Inst. for Nucl. Research and Nucl. Energy Sofia, Bulgaria)
- G. N. Kimeridze(Abastumani Observatory Mt. Kanobili, Georgia)
- G. T. Richards(School of Physics and Center for Relativistic Astrophysics Georgia Institute of Technology, Atlanta, USA)
- H. C. Lin(Graduate Institute of Astronomy National Central University, Jhongli, Taiwan)
- H. D. Aller(Department of Astronomy University of Michigan, Ann Arbor, USA)
- H. Kellermann(Max-Planck-Institut für Physik München, Germany)
- H. Kubo(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- H. Prokoph(Deutsches Elektronen-Synchrotron)
- H. Takami(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- I. Lozano(Universidad Complutense Madrid, Spain)
- I. Puljak(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- I. S. Troitsky(Astron. Inst. St.-Petersburg State University, Russia)
- I. Snidaric(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- I. Telezhinsky(Institute of Physics and Astronomy University of Potsdam, Potsdam-Golm, Germany)
- J. A. Barrio(Universidad Complutense Madrid, Spain)
- J. A. Ros(Agrupació Astronòmica de Sabadell Spain)
- J. Aleksić(IFAE Campus UAB, Bellaterra, Spain)
- J. Becerra González(Inst. de Astrofísica de Canarias Tenerife, Spain)
- J. Biteau(Santa Cruz Institute for Particle Physics and Department of Physics University of California, Santa Cruz, USA)
- J. Cortina(IFAE Campus UAB, Bellaterra, Spain)
- J. D. Eisch(Department of Physics and Astronomy Iowa State University, Ames, USA)
- J. Finke(Space Science Division Naval Research Laboratory, Washington DC, USA)
- J. H. Buckley(Department of Physics Washington University, St. Louis, USA)
- J. Herrera(Inst. de Astrofísica de Canarias Tenerife, Spain)
- J. Holder(Department of Physics and Astronomy and the Bartol Research Institute University of Delaware, Newark, USA)
- J. Hose(Max-Planck-Institut für Physik München, Germany)
- J. Krause(Max-Planck-Institut für Physik München, Germany)
- J. Kushida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- J. L. Contreras(Universidad Complutense Madrid, Spain)
- J. L. Richards(Department of Physics and Astronomy Purdue University, West Lafayette, USA)
- J. M. Miranda(Università di Siena and INFN Pisa, Siena, Italy)
- J. M. Paredes(Universitat de Barcelona ICC, IEEC-UB, Barcelona, Spain)
- J. Millis(Department of Physics Anderson University, Anderson, USA)
- J. P. Finley(Department of Physics and Astronomy Purdue University, West Lafayette, USA)
- J. Rico(IFAE Campus UAB, Bellaterra, Spain)
- J. Rodriguez Garcia(Max-Planck-Institut für Physik München, Germany)
- J. S. Perkins(NASA Goddard Space Flight Center Greenbelt, USA and Department of Physics and Department of Astronomy, University of Maryland, College Park, USA)
- J. Sitarek(IFAE Campus UAB, Bellaterra, Spain)
- J. Storz(Universität Würzburg Würzburg, Germany)
- J. Thaele(Technische Universität Dortmund Dortmund, Germany)
- J. Tyler(Physics Department McGill University, Montreal, Canada)
- J. V. Tucci(Department of Physics and Astronomy Purdue University, West Lafayette, USA)
- J. W. Moody(Department of Physics and Astronomy Brigham Young University, Provo, Utah)
- K. Berger(Department of Physics and Astronomy and the Bartol Research Institute University of Delaware, Newark, USA)
- K. Frantzen(Technische Universität Dortmund Dortmund, Germany)
- K. Kodani(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Mallot(Deutsches Elektronen-Synchrotron)
- K. Mannheim(Universität Würzburg Würzburg, Germany)
- K. Meagher(School of Physics and Center for Relativistic Astrophysics Georgia Institute of Technology, Atlanta, USA)
- K. Nilsson(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- K. Nishijima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Noda(Max-Planck-Institut für Physik München, Germany)
- K. Ragan(Physics Department McGill University, Montreal, Canada)
- K. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Satalecka(Universidad Complutense Madrid, Spain)
- K. Shahinyan(School of Physics and Astronomy University of Minnesota, Minneapolis, USA)
- L. A. Antonelli(INAF National Institute for Astrophysics Rome, Italy)
- L. A. Sigua(Abastumani Observatory Mt. Kanobili, Georgia)
- L. C. Reyes(Physics Department California Polytechnic State University, San Luis Obispo, USA)
- L. Ciupik(Astronomy Department Adler Planetarium and Astronomy Museum, Chicago, USA)
- L. Font(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, Bellaterra, Spain)
- L. Fortson(School of Physics and Astronomy University of Minnesota, Minneapolis, USA)
- L. Maraschi(INAF National Institute for Astrophysics Rome, Italy)
- L. Takalo(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- M. A. Gurwell(Harvard-Smithsonian Center for Astrophysics Cambridge, USA)
- M. Beilicke(Department of Physics Washington University, St. Louis, USA)
- M. Cerruti(Fred Lawrence Whipple Observatory Harvard-Smithsonian Center for Astrophysics, Amado, USA)
- M. Doro(Università di Padova and INFN Padova, Italy)
- M. F. Aller(Department of Astronomy University of Michigan, Ann Arbor, USA)
- M. G. Nikolashvili(Abastumani Observatory Mt. Kanobili, Georgia)
- M. Garczarczyk(Deutsches Elektronen-Synchrotron)
- M. Gaug(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, Bellaterra, Spain)
- M. Hayashida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- M. J. Lang(School of Physics National University of Ireland Galway, Galway, Ireland)
- M. Kertzman(Department of Physics and Astronomy DePauw University, Greencastle, USA)
- M. L. Knoetig(ETH Zurich Zurich, Switzerland)
- M. López(Universidad Complutense Madrid, Spain)
- M. Makariev(Inst. for Nucl. Research and Nucl. Energy Sofia, Bulgaria)
- M. Mariotti(Università di Padova and INFN Padova, Italy)
- M. Martínez(IFAE Campus UAB, Bellaterra, Spain)
- M. Palatiello(Università di Udine and INFN Trieste, Udine, Italy)
- M. Perri(INAF National Institute for Astrophysics Rome, Italy)
- M. Persic(Università di Udine and INFN Trieste, Udine, Italy)
- M. Pohl(Institute of Physics and Astronomy University of Potsdam, Potsdam-Golm, Germany)
- M. Ribó(Universitat de Barcelona ICC, IEEC-UB, Barcelona, Spain)
- M. Strzys(Max-Planck-Institut für Physik München, Germany)
- M. Teshima(Max-Planck-Institut für Physik München, Germany)
- M. Tornikoski(Aalto University Metsähovi Radio Observatory Kylmälä, Finland)
- M. Uellenbeck(Technische Universität Dortmund Dortmund, Germany)
- M. V. Fonseca(Universidad Complutense Madrid, Spain)
- M. Villata(INAF Osservatorio Astronomico di Torino, Pino Torinese, Italy)
- N. Galante(Fred Lawrence Whipple Observatory Harvard-Smithsonian Center for Astrophysics, Amado, USA)
- N. Godinović(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- N. Håkansson(Institute of Physics and Astronomy University of Potsdam, Potsdam-Golm, Germany)
- N. Lewandowska(Universität Würzburg Würzburg, Germany)
- N. Mankuzhiyil(Università di Udine and INFN Trieste, Udine, Italy)
- O. Blanch(IFAE Campus UAB, Bellaterra, Spain)
- O. M. Kurtanidze(Abastumani Observatory Mt. Kanobili, Georgia)
- O. Tibolla(Universität Würzburg Würzburg, Germany)
- P. Antoranz(Università di Siena and INFN Pisa, Siena, Italy)
- P. Bangale(Max-Planck-Institut für Physik München, Germany)
- P. Colin(Max-Planck-Institut für Physik München, Germany)
- P. Da Vela(Università di Siena and INFN Pisa, Siena, Italy)
- P. Fortin(Fred Lawrence Whipple Observatory Harvard-Smithsonian Center for Astrophysics, Amado, USA)
- P. G. Prada Moroni(Università di Pisa and INFN Pisa, Pisa, Italy)
- P. Kaaret(Department of Physics and Astronomy University of Iowa, Van Allen Hall, Iowa City, USA)
- P. Kar(Department of Physics and Astronomy University of Utah, Salt Lake City, USA)
- P. Moriarty(School of Physics National University of Ireland Galway, Galway, Ireland)
- P. Munar-Adrover(Universitat de Barcelona ICC, IEEC-UB, Barcelona, Spain)
- P. S. Smith(Steward Observatory University of Arizona, Tucson, USA)
- P. T. Reynolds(Department of Applied Physics and Instrumentation Cork Institute of Technology, Bishopstown, Cork, Ireland)
- P. Temnikov(Inst. for Nucl. Research and Nucl. Energy Sofia, Bulgaria)
- P. Vogler(ETH Zurich Zurich, Switzerland)
- Q. Feng(Department of Physics and Astronomy Purdue University, West Lafayette, USA)
- R. A. Ong(Department of Physics and Astronomy University of California, Los Angeles, USA)
- R. Bird(School of Physics University College Dublin, Dublin, Ireland)
- R. J. García López(Inst. de Astrofísica de Canarias Tenerife, Spain)
- R. López-Coto(IFAE Campus UAB, Bellaterra, Spain)
- R. Mirzoyan(Max-Planck-Institut für Physik München, Germany)
- R. Orito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- R. Paoletti(Università di Siena and INFN Pisa, Siena, Italy)
- R. Reinthal(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- R. Welsing(Deutsches Elektronen-Synchrotron)
- R. Zanin(Universitat de Barcelona ICC, IEEC-UB, Barcelona, Spain)
- S. Ansoldi(Università di Udine and INFN Trieste, Udine, Italy)
- S. Archambault(Physics Department McGill University, Montreal, Canada)
- S. Bonnefoy(Universidad Complutense Madrid, Spain)
- S. Buson(Università di Padova and INFN Padova, Italy)
- S. Covino(INAF National Institute for Astrophysics Rome, Italy)
- S. Einecke(Technische Universität Dortmund Dortmund, Germany)
- S. G. Jorstad(Institute for Astrophysical Research Boston University, Boston, USA)
- S. Griffin(Physics Department McGill University, Montreal, Canada)
- S. Lombardi(INAF National Institute for Astrophysics Rome, Italy)
- S. McArthur(Enrico Fermi Institute University of Chicago, Chicago, USA)
- S. N. Shore(Università di Pisa and INFN Pisa, Pisa, Italy)
- S. O. Kurtanidze(Abastumani Observatory Mt. Kanobili, Georgia)
- S. P. Wakely(Enrico Fermi Institute University of Chicago, Chicago, USA)
- S. Paiano(Università di Padova and INFN Padova, Italy)
- S. R. Gozzini(Deutsches Elektronen-Synchrotron)
- S. Rügamer(Universität Würzburg Würzburg, Germany)
- S. Sun(Max-Planck-Institut für Physik München, Germany)
- T. Bretz(Universität Würzburg Würzburg, Germany)
- T. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- T. Sakamoto(Department of Physics and Mathematics College of Science and Engineering, Aoyama Gakuin University, Chuoku, Japan)
- T. Schweizer(Max-Planck-Institut für Physik München, Germany)
- T. Steinbring(Universität Würzburg Würzburg, Germany)
- T. Terzić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- T. Toyama(Max-Planck-Institut für Physik München, Germany)
- The MAGIC Collaboration
- The VERITAS Collaboration(Physics Department McGill University, Montreal, Canada)
- U. Barres de Almeida(Max-Planck-Institut für Physik München, Germany)
- U. Menzel(Max-Planck-Institut für Physik München, Germany)
- V. Bugaev(Department of Physics Washington University, St. Louis, USA)
- V. Kadenius(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- V. M. Larionov(Astron. Inst. St.-Petersburg State University, Russia)
- V. Scalzotto(Università di Padova and INFN Padova, Italy)
- V. Scapin(Universidad Complutense Madrid, Spain)
- V. Stamatescu(IFAE Campus UAB, Bellaterra, Spain)
- W. Bednarek(University of Łód Lodz, Poland)
- W. Benbow(Fred Lawrence Whipple Observatory Harvard-Smithsonian Center for Astrophysics, Amado, USA)
- W. Cui(Department of Physics and Astronomy Purdue University, West Lafayette, USA)
- W. Idec(University of Łód Lodz, Poland)
- W. Max-Moerbeck(Cahill Center for Astronomy and Astrophysics California Institute of Technology, Pasadena, USA)
- W. P. Chen(Graduate Institute of Astronomy National Central University, Jhongli, Taiwan)
- W. Rhode(Technische Universität Dortmund Dortmund, Germany)
- X. Chen(Institute of Physics and Astronomy University of Potsdam, Potsdam-Golm, Germany)
- X. Paredes-Fortuny(Universitat de Barcelona ICC, IEEC-UB, Barcelona, Spain)
- Y. Hanabata(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- Y. Konno(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- Publication venue
- Publication date
- Field of study
A flare from the TeV blazar Mrk 421, occurring in March 2010, was observed
for 13 consecutive days from radio to very high energy (VHE, E > 100 GeV)
gamma-rays with MAGIC, VERITAS, Whipple, FermiLAT, MAXI, RXTE, Swift,
GASP-WEBT, and several optical and radio telescopes. We model the day-scale
SEDs with one-zone and two-zone synchrotron self-Compton (SSC) models,
investigate the physical parameters, and evaluate whether the observed
broadband SED variability can be associated to variations in the relativistic
particle population.
Flux variability was remarkable in the X-ray and VHE bands while it was minor
or not significant in the other bands. The one-zone SSC model can describe
reasonably well the SED of each day for the 13 consecutive days. This flaring
activity is also very well described by a two-zone SSC model, where one zone is
responsible for the quiescent emission while the other smaller zone, which is
spatially separated from the first one, contributes to the daily-variable
emission occurring in X-rays and VHE gamma-rays.
Both the one-zone SSC and the two-zone SSC models can describe the daily SEDs
via the variation of only four or five model parameters, under the hypothesis
that the variability is associated mostly to the underlying particle
population. This shows that the particle acceleration and cooling mechanism
producing the radiating particles could be the main one responsible for the
broadband SED variations during the flaring episodes in blazars. The two-zone
SSC model provides a better agreement to the observed SED at the narrow peaks
of the low- and high-energy bumps during the highest activity, although the
reported one-zone SSC model could be further improved by the variation of the
parameters related to the emitting region itself (δ, B and R), in
addition to the parameters related to the particle population
Discovery of VHE gamma-rays from the blazar 1ES 1215+303 with the MAGIC Telescopes and simultaneous multi-wavelength observations
- Author
- A. Berdyugin(Tuorla Observatory University of Turku, Piikkiö, Finland)
- A. Biland(ETH Zurich Zurich, Switzerland)
- A. Boller(ETH Zurich Zurich, Switzerland)
- A. Carosi(INAF National Institute for Astrophysics Rome, Italy)
- A. Cañellas(Universitat de Barcelona)
- A. De Angelis(Università di Udine and INFN Trieste, Udine, Italy)
- A. Diago Ortega(Inst. de Astrofísica de Canarias Tenerife, Spain)
- A. Domínguez(Inst. de Astrofísica de Andalucía)
- A. González Muñoz(IFAE Bellaterra, Spain)
- A. Herrero(Inst. de Astrofísica de Canarias Tenerife, Spain)
- A. La Barbera(INAF National Institute for Astrophysics Rome, Italy)
- A. Lähteenmäki(Aalto University Metsähovi Radio Observatory Metsähovintie, Finland)
- A. López-Oramas(IFAE Bellaterra, Spain)
- A. Moralejo(IFAE Bellaterra, Spain)
- A. Niedzwiecki(University of Łódź Lodz, Poland)
- A. Saggion(Università di Padova and INFN Padova, Italy)
- A. Sillanpää(Tuorla Observatory University of Turku, Piikkiö, Finland)
- A. Stamerra(Università di Siena and INFN Pisa, Italy)
- A. Treves(Università dell'Insubria Como, Como, Italy)
- B. De Lotto(Università di Udine and INFN Trieste, Udine, Italy)
- B. Huber(ETH Zurich Zurich, Switzerland)
- B. Steinke(Max-Planck-Institut für Physik München, Germany)
- C. Delgado Mendez(Inst. de Astrofísica de Canarias Tenerife, Spain)
- C. Fruck(Max-Planck-Institut für Physik München, Germany)
- C. Schultz(Università di Padova and INFN Padova, Italy)
- D. Bastieri(Università di Padova and INFN Padova, Italy)
- D. Borla Tridon(Max-Planck-Institut für Physik München, Germany)
- D. Dominis Prester(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- D. Dorner(ETH Zurich Zurich, Switzerland)
- D. Eisenacher(Universität Würzburg Würzburg, Germany)
- D. Elsaesser(Universität Würzburg Würzburg, Germany)
- D. F. Torres(ICREA Barcelona, Spain)
- D. Ferenc(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- D. Garrido Terrats(Universitat Autònoma de Barcelona Bellaterra, Spain)
- D. Hadasch(Institut de Ciències de l'Espai)
- D. Hildebrand(ETH Zurich Zurich, Switzerland)
- D. Hrupec(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- D. Häfner(Max-Planck-Institut für Physik München, Germany)
- D. Lelas(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- D. Mazin(IFAE Bellaterra, Spain)
- D. Nieto(Universidad Complutense Madrid, Spain)
- D. Paneque(Max-Planck-Institut für Physik München, Germany)
- D. Sobczynska(University of Łódź Lodz, Poland)
- D. Tescaro(Inst. de Astrofísica de Canarias Tenerife, Spain)
- E. A. Alvarez(Universidad Complutense Madrid, Spain)
- E. Bernardini(Deutsches Elektronen-Synchrotron)
- E. Carmona(Max-Planck-Institut für Physik München, Germany)
- E. Colombo(Inst. de Astrofísica de Canarias Tenerife, Spain)
- E. De Cea del Pozo(Institut de Ciències de l'Espai)
- E. Järvelä(Aalto University Metsähovi Radio Observatory Metsähovintie, Finland)
- E. Leonardo(Università di Siena and INFN Pisa, Italy)
- E. Lindfors(Tuorla Observatory University of Turku, Piikkiö, Finland)
- E. Lorenz(Max-Planck-Institut für Physik München, Germany)
- E. Prandini(Università di Padova and INFN Padova, Italy)
- F. Dazzi(Università di Udine and INFN Trieste, Udine, Italy)
- F. Jankowski(Deutsches Elektronen-Synchrotron)
- F. Prada(Inst. de Astrofísica de Andalucía)
- F. Spanier(Universität Würzburg Würzburg, Germany)
- F. Tavecchio(INAF National Institute for Astrophysics Rome, Italy)
- F. Zandanel(Inst. de Astrofísica de Andalucía)
- G. Bonnoli(INAF National Institute for Astrophysics Rome, Italy)
- G. De Caneva(Deutsches Elektronen-Synchrotron)
- G. Giavitto(IFAE Bellaterra, Spain)
- G. Maneva(Inst. for Nucl. Research and Nucl. Energy Sofia, Bulgaria)
- H. Kellermann(Max-Planck-Institut für Physik München, Germany)
- H. Takami(Max-Planck-Institut für Physik München, Germany)
- I. Puerto Gimenez(Inst. de Astrofísica de Canarias Tenerife, Spain)
- I. Puljak(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- I. Reichardt(IFAE Bellaterra, Spain)
- I. Snidaric(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- J. A. Barrio(Universidad Complutense Madrid, Spain)
- J. Aleksić(IFAE Bellaterra, Spain)
- J. Becerra González(Inst. de Astrofísica de Canarias Tenerife, Spain)
- J. Cortina(IFAE Bellaterra, Spain)
- J. Hose(Max-Planck-Institut für Physik München, Germany)
- J. Krause(Max-Planck-Institut für Physik München, Germany)
- J. L. Contreras(Universidad Complutense Madrid, Spain)
- J. M. Miranda(Università di Siena and INFN Pisa, Italy)
- J. M. Paredes(Universitat de Barcelona)
- J. Moldón(Universitat de Barcelona)
- J. Pochon(Inst. de Astrofísica de Canarias Tenerife, Spain)
- J. Rico(ICREA Barcelona, Spain)
- J. Sitarek(IFAE Bellaterra, Spain)
- J. Storz(Universität Würzburg Würzburg, Germany)
- J. Tammi(Aalto University Metsähovi Radio Observatory Metsähovintie, Finland)
- K. Berger(Inst. de Astrofísica de Canarias Tenerife, Spain)
- K. Mannheim(Universität Würzburg Würzburg, Germany)
- K. Nilsson(Tuorla Observatory University of Turku, Piikkiö, Finland)
- K. Saito(Max-Planck-Institut für Physik München, Germany)
- K. Satalecka(Universidad Complutense Madrid, Spain)
- L. A. Antonelli(INAF National Institute for Astrophysics Rome, Italy)
- L. Cossio(Università di Udine and INFN Trieste, Udine, Italy)
- L. Font(Universitat Autònoma de Barcelona Bellaterra, Spain)
- L. Maraschi(INAF National Institute for Astrophysics Rome, Italy)
- L. Takalo(Tuorla Observatory University of Turku, Piikkiö, Finland)
- M. A. Perez-Torres(IFAE Bellaterra, Spain)
- M. Asensio(Universidad Complutense Madrid, Spain)
- M. Backes(Technische Universität Dortmund Dortmund, Germany)
- M. Doert(Technische Universität Dortmund Dortmund, Germany)
- M. Doro(Universitat Autònoma de Barcelona Bellaterra, Spain)
- M. Garczarczyk(Inst. de Astrofísica de Canarias Tenerife, Spain)
- M. López(Universidad Complutense Madrid, Spain)
- M. Makariev(Inst. for Nucl. Research and Nucl. Energy Sofia, Bulgaria)
- M. Mariotti(Università di Padova and INFN Padova, Italy)
- M. Martínez(IFAE Bellaterra, Spain)
- M. Meucci(Università di Siena and INFN Pisa, Italy)
- M. Persic(Università di Udine and INFN Trieste, Udine, Italy)
- M. Pilia(Università dell'Insubria Como, Como, Italy)
- M. Ribó(Universitat de Barcelona)
- M. Salvati(INAF National Institute for Astrophysics Rome, Italy)
- M. Teshima(Max-Planck-Institut für Physik München, Germany)
- M. Uellenbeck(Technische Universität Dortmund Dortmund, Germany)
- M. V. Fonseca(Universidad Complutense Madrid, Spain)
- MAGIC Collaboration
- N. Godinović(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- N. Lewandowska(Universität Würzburg Würzburg, Germany)
- N. Mankuzhiyil(Università di Udine and INFN Trieste, Udine, Italy)
- N. Nowak(Max-Planck-Institut für Physik München, Germany)
- N. Strah(Technische Universität Dortmund Dortmund, Germany)
- O. Blanch(IFAE Bellaterra, Spain)
- O. Tibolla(Universität Würzburg Würzburg, Germany)
- P. Antoranz(Università di Siena and INFN Pisa, Italy)
- P. Colin(Max-Planck-Institut für Physik München, Germany)
- P. Da Vela(Università di Siena and INFN Pisa, Italy)
- P. G. Prada Moroni(Università di Pisa and INFN Pisa, Pisa, Italy)
- P. Munar-Adrover(Universitat de Barcelona)
- P. Temnikov(Inst. for Nucl. Research and Nucl. Energy Sofia, Bulgaria)
- P. Vogler(ETH Zurich Zurich, Switzerland)
- Q. Weitzel(ETH Zurich Zurich, Switzerland)
- R. J. García López(Inst. de Astrofísica de Canarias Tenerife, Spain)
- R. K. Bock(Max-Planck-Institut für Physik München, Germany)
- R. López-Coto(IFAE Bellaterra, Spain)
- R. M. Wagner(Max-Planck-Institut für Physik München, Germany)
- R. Mirzoyan(Max-Planck-Institut für Physik München, Germany)
- R. Orito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- R. Paoletti(Università di Siena and INFN Pisa, Italy)
- R. Reinthal(Tuorla Observatory University of Turku, Piikkiö, Finland)
- R. Zanin(Universitat de Barcelona)
- S. Ansoldi(Università di Udine and INFN Trieste, Udine, Italy)
- S. Buson(Università di Padova and INFN Padova, Italy)
- S. Covino(INAF National Institute for Astrophysics Rome, Italy)
- S. Klepser(IFAE Bellaterra, Spain)
- S. Larsson(Department of Physics Stockholm University, Stockholm, Sweden)
- S. Lombardi(Università di Padova and INFN Padova, Italy)
- S. N. Shore(Università di Pisa and INFN Pisa, Pisa, Italy)
- S. Paiano(Università di Padova and INFN Padova, Italy)
- S. Pardo(Universidad Complutense Madrid, Spain)
- S. Partini(Università di Siena and INFN Pisa, Italy)
- S. R. Gozzini(Deutsches Elektronen-Synchrotron)
- S. Rügamer(Universität Würzburg Würzburg, Germany)
- S. Spiro(INAF National Institute for Astrophysics Rome, Italy)
- S. Sun(Max-Planck-Institut für Physik München, Germany)
- T. Bretz(Universität Würzburg Würzburg, Germany)
- T. Jogler(Max-Planck-Institut für Physik München, Germany)
- T. Krähenbühl(ETH Zurich Zurich, Switzerland)
- T. Schweizer(Max-Planck-Institut für Physik München, Germany)
- T. Surić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- T. Terzić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, Zagreb, Croatia)
- T. Y. Saito(Max-Planck-Institut für Physik München, Germany)
- U. Barres de Almeida(Max-Planck-Institut für Physik München, Germany)
- V. Kadenius(Tuorla Observatory University of Turku, Piikkiö, Finland)
- V. Scalzotto(Università di Padova and INFN Padova, Italy)
- V. Scapin(Universidad Complutense Madrid, Spain)
- V. Stamatescu(IFAE Bellaterra, Spain)
- V. Zabalza(Universitat de Barcelona)
- W. Bednarek(University of Łódź Lodz, Poland)
- W. Rhode(Technische Universität Dortmund Dortmund, Germany)
- Publication venue
- Publication date
- Field of study
Context. We present the discovery of very high energy (VHE, E > 100GeV)
gamma-ray emission from the BL Lac object 1ES 1215+303 by the MAGIC telescopes
and simultaneous multi-wavelength data in a broad energy range from radio to
gamma-rays. Aims. We study the VHE gamma-ray emission from 1ES 1215+303 and its
relation to the emissions in other wavelengths. Methods. Triggered by an
optical outburst, MAGIC observed the source in January-February 2011 for 20.3
hrs. The target was monitored in the optical R-band by the KVA telescope that
also performed optical polarization measurements. We triggered target of
opportunity observations with the Swift satellite and obtained simultaneous and
quasi-simultaneous data from the Fermi Large Area Telescope and from the
Mets\"ahovi radio telescope. We also present the analysis of older MAGIC data
taken in 2010. Results. The MAGIC observations of 1ES 1215+303 carried out in
January-February 2011 resulted in the first detection of the source at VHE with
a statistical significance of 9.4 sigma. Simultaneously, the source was
observed in a high optical and X-ray state. In 2010 the source was observed in
a lower state in optical, X-ray, and VHE, while the GeV gamma-ray flux and the
radio flux were comparable in 2010 and 2011. The spectral energy distribution
obtained with the 2011 data can be modeled with a simple one zone SSC model,
but it requires extreme values for the Doppler factor or the electron energy
distribution
MAGIC reveals a complex morphology within the unidentified gamma-ray source HESS J1857+026
- Author
- A. Babic(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- A. Biland(ETH Zurich CH-8093 Zurich, Switzerland)
- A. Carosi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. De Angelis(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- A. Domínguez(Inst. de Astrofísica de Andalucía)
- A. González Muñoz(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Herrero(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- A. La Barbera(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. López-Oramas(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Moralejo(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Niedzwiecki(University of Łódź PL-90236 Lodz, Poland)
- A. Overkemping(Technische Universität Dortmund D-44221 Dortmund, Germany)
- A. Saggion(Università di Padova and INFN I-35131 Padova, Italy)
- A. Sillanpää(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- A. Stamerra(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. Treves(Università dell'Insubria Como, I-22100 Como, Italy)
- B. De Lotto(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- B. Marcote(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- C. Delgado Mendez(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- C. Fruck(Max-Planck-Institut für Physik D-80805 München, Germany)
- C. Schultz(Università di Padova and INFN I-35131 Padova, Italy)
- D. Dominis Prester(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Dorner(Universität Würzburg D-97074 Würzburg, Germany)
- D. Eisenacher(Universität Würzburg D-97074 Würzburg, Germany)
- D. Elsaesser(Universität Würzburg D-97074 Würzburg, Germany)
- D. F. Torres(Institut de Ciències de l'Espai)
- D. Ferenc(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Fidalgo Carreto(Universidad Complutense E-28040 Madrid, Spain)
- D. Garrido Terrats(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- D. Hadasch(Institut de Ciències de l'Espai)
- D. Hildebrand(ETH Zurich CH-8093 Zurich, Switzerland)
- D. Hrupec(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Lelas(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Mazin(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Nakajima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- D. Paneque(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Sobczynska(University of Łódź PL-90236 Lodz, Poland)
- D. Tescaro(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. Bernardini(Deutsches Elektronen-Synchrotron)
- E. Carmona(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- E. Colombo(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. de Oña Wilhelmi(Institut de Ciències de l'Espai)
- E. Farina(Università dell'Insubria Como, I-22100 Como, Italy)
- E. Lindfors(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- E. Lorenz(Max-Planck-Institut für Physik D-80805 München, Germany)
- E. Prandini(ETH Zurich CH-8093 Zurich, Switzerland)
- F. Borracci(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. Dazzi(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. Prada(Inst. de Astrofísica de Andalucía)
- F. Spanier(Universität Würzburg D-97074 Würzburg, Germany)
- F. Tavecchio(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- F. Zandanel(Inst. de Astrofísica de Andalucía)
- G. Bonnoli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- G. De Caneva(Deutsches Elektronen-Synchrotron)
- G. Maneva(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- H. Kellermann(Max-Planck-Institut für Physik D-80805 München, Germany)
- H. Kubo(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- H. Takami(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- I. Lozano(Universidad Complutense E-28040 Madrid, Spain)
- I. Puljak(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- I. Snidaric(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- J. A. Barrio(Universidad Complutense E-28040 Madrid, Spain)
- J. Aleksić(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Becerra González(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Cortina(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Herrera(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Hose(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Krause(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Kushida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- J. L. Contreras(Universidad Complutense E-28040 Madrid, Spain)
- J. M. Miranda(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- J. M. Paredes(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- J. Rico(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Rodriguez Garcia(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Sitarek(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Storz(Universität Würzburg D-97074 Würzburg, Germany)
- J. Thaele(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Frantzen(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Kodani(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Mallot(Deutsches Elektronen-Synchrotron)
- K. Mannheim(Universität Würzburg D-97074 Würzburg, Germany)
- K. Nilsson(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- K. Nishijima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Noda(Max-Planck-Institut für Physik D-80805 München, Germany)
- K. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Satalecka(Universidad Complutense E-28040 Madrid, Spain)
- L. A. Antonelli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. Font(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- L. Maraschi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. Takalo(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- M. Doert(Technische Universität Dortmund D-44221 Dortmund, Germany)
- M. Doro(Università di Padova and INFN I-35131 Padova, Italy)
- M. Garczarczyk(Deutsches Elektronen-Synchrotron)
- M. Gaug(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- M. Hayashida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- M. López(Universidad Complutense E-28040 Madrid, Spain)
- M. Makariev(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- M. Mariotti(Università di Padova and INFN I-35131 Padova, Italy)
- M. Martínez(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- M. Meucci(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- M. Palatiello(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Persic(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Ribó(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- M. Strzys(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. Teshima(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. Uellenbeck(Technische Universität Dortmund D-44221 Dortmund, Germany)
- M. V. Fonseca(Universidad Complutense E-28040 Madrid, Spain)
- MAGIC Collaboration
- N. Godinović(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- N. Lewandowska(Universität Würzburg D-97074 Würzburg, Germany)
- N. Mankuzhiyil(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- N. Nowak(Max-Planck-Institut für Physik D-80805 München, Germany)
- O. Blanch(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- O. Tibolla(Universität Würzburg D-97074 Würzburg, Germany)
- P. Antoranz(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. Bangale(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Colin(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Da Vela(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. G. Prada Moroni(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- P. Munar-Adrover(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- P. Temnikov(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- P. Vogler(ETH Zurich CH-8093 Zurich, Switzerland)
- R. J. García López(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- R. López-Coto(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- R. M. Wagner(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. Mirzoyan(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. Orito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- R. Paoletti(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- R. Reinthal(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- R. Zanin(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- S. Ansoldi(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- S. Bonnefoy(Universidad Complutense E-28040 Madrid, Spain)
- S. Covino(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. Einecke(Technische Universität Dortmund D-44221 Dortmund, Germany)
- S. Klepser(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- S. Lombardi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. N. Shore(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- S. Paiano(Università di Padova and INFN I-35131 Padova, Italy)
- S. Partini(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- S. Preziuso(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- S. R. Gozzini(Deutsches Elektronen-Synchrotron)
- S. Rügamer(Universität Würzburg D-97074 Würzburg, Germany)
- S. Sun(Max-Planck-Institut für Physik D-80805 München, Germany)
- T. Bretz(Universität Würzburg D-97074 Würzburg, Germany)
- T. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- T. Schweizer(Max-Planck-Institut für Physik D-80805 München, Germany)
- T. Steinbring(Universität Würzburg D-97074 Würzburg, Germany)
- T. Surić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- T. Terzić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- T. Toyama(Max-Planck-Institut für Physik D-80805 München, Germany)
- U. Barres de Almeida(Max-Planck-Institut für Physik D-80805 München, Germany)
- U. Menzel(Max-Planck-Institut für Physik D-80805 München, Germany)
- V. Kadenius(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- V. Scalzotto(Università di Padova and INFN I-35131 Padova, Italy)
- V. Scapin(Universidad Complutense E-28040 Madrid, Spain)
- V. Stamatescu(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- W. Bednarek(University of Łódź PL-90236 Lodz, Poland)
- W. Idec(University of Łódź PL-90236 Lodz, Poland)
- W. Rhode(Technische Universität Dortmund D-44221 Dortmund, Germany)
- X. Paredes-Fortuny(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- Y. Konno(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- Publication venue
- Publication date
- Field of study
HESS J1857+026 is an extended TeV gamma-ray source that was discovered by
H.E.S.S. as part of its Galactic plane survey. Given its broadband spectral
energy distribution and its spatial coincidence with the young energetic pulsar
PSR J1856+0245, the source has been put forward as a pulsar wind nebula (PWN)
candidate. MAGIC has performed follow-up observations aimed at mapping the
source down to energies approaching 100 GeV in order to better understand its
complex morphology. HESS J1857+026 was observed by MAGIC in 2010, yielding 29
hours of good quality stereoscopic data that allowed us to map the source
region in two separate ranges of energy. We detected very-high-energy gamma-ray
emission from HESS J1857+026 with a significance of 12σ above 150
GeV. The differential energy spectrum between 100 GeV and 13 TeV is well
described by a power law function dN/dE=N0(E/1TeV)−Γ with
N0=(5.37±0.44stat±1.5sys)×10−12(TeV−1cm−2 s−1) and Γ=2.16±0.07stat±0.15sys, which bridges the gap between the GeV emission measured by
Fermi-LAT and the multi-TeV emission measured by H.E.S.S.. In addition, we
present a detailed analysis of the energy-dependent morphology of this region.
We couple these results with archival multi-wavelength data and outline
evidence in favor of a two-source scenario, whereby one source is associated
with a PWN, while the other could be linked with a molecular cloud complex
containing an HII region and a possible gas cavity
Measurement of the Crab Nebula spectrum over three decades in energy with the MAGIC telescopes
- Author
- A. Babic(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- A. Biland(ETH Zurich CH-8093 Zurich, Switzerland)
- A. Carosi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. De Angelis(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- A. González Muñoz(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. La Barbera(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. López-Oramas(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Moralejo(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Niedzwiecki(University of Łódź PL-90236 Lodz, Poland)
- A. Overkemping(Technische Universität Dortmund D-44221 Dortmund, Germany)
- A. Sillanpää(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- A. Stamerra(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. Treves(Università dell'Insubria and INFN Milano Bicocca Como, I-22100 Como, Italy)
- B. Biasuzzi(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- B. De Lotto(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- B. Marcote(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- C. Delgado Mendez(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- C. Fruck(Max-Planck-Institut für Physik D-80805 München, Germany)
- C. Schultz(Università di Padova and INFN I-35131 Padova, Italy)
- D. Dominis Prester(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Dorner(Universität Würzburg D-97074 Würzburg, Germany)
- D. Eisenacher(Universität Würzburg D-97074 Würzburg, Germany)
- D. Elsaesser(Universität Würzburg D-97074 Würzburg, Germany)
- D. F. Torres(ICREA and Institute of Space Sciences E-08193 Barcelona, Spain)
- D. Fidalgo(Universidad Complutense E-28040 Madrid, Spain)
- D. Galindo(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- D. Garrido Terrats(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- D. Hadasch(Institute of Space Sciences E-08193 Barcelona, Spain)
- D. Hildebrand(ETH Zurich CH-8093 Zurich, Switzerland)
- D. Horns(Institut für ExperimentalPhysik Univ. Hamburg, D-22761, Hamburg, Germany)
- D. Hrupec(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Lelas(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Mazin(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Nakajima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- D. Paneque(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Sobczynska(University of Łódź PL-90236 Lodz, Poland)
- D. Tescaro(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. Bernardini(Deutsches Elektronen-Synchrotron)
- E. Carmona(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- E. Colombo(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. de Oña Wilhelmi(Institute of Space Sciences E-08193 Barcelona, Spain)
- E. Lindfors(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- E. Lorenz(Max-Planck-Institut für Physik D-80805 München, Germany)
- E. Prandini(ETH Zurich CH-8093 Zurich, Switzerland)
- F. Borracci(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. Dazzi(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. Longo(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- F. Spanier(Universität Würzburg D-97074 Würzburg, Germany)
- F. Tavecchio(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- for the MAGIC collaboration(Institut für ExperimentalPhysik Univ. Hamburg, D-22761, Hamburg, Germany)
- G. Bonnoli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- G. De Caneva(Deutsches Elektronen-Synchrotron)
- G. Maneva(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- H. Kellermann(Max-Planck-Institut für Physik D-80805 München, Germany)
- H. Kubo(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- H. Takami(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- I. Lozano(Universidad Complutense E-28040 Madrid, Spain)
- I. Puljak(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- I. Snidaric(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- J. A. Barrio(Universidad Complutense E-28040 Madrid, Spain)
- J. Aleksić(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Becerra González(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Cortina(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Herrera(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Hose(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Krause(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Kushida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- J. L. Contreras(Universidad Complutense E-28040 Madrid, Spain)
- J. M. Miranda(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- J. M. Paredes(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- J. Martin(ICREA and Institute of Space Sciences E-08193 Barcelona, Spain)
- J. Poutanen(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- J. Rico(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Rodriguez Garcia(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Sitarek(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Storz(Universität Würzburg D-97074 Würzburg, Germany)
- J. Thaele(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Frantzen(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Kodani(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Mallot(Deutsches Elektronen-Synchrotron)
- K. Mannheim(Universität Würzburg D-97074 Würzburg, Germany)
- K. Nilsson(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- K. Nishijima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Noda(Max-Planck-Institut für Physik D-80805 München, Germany)
- K. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Satalecka(Universidad Complutense E-28040 Madrid, Spain)
- L. A. Antonelli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. Font(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- L. Maraschi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. Takalo(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- M. Doro(Università di Padova and INFN I-35131 Padova, Italy)
- M. Garczarczyk(Deutsches Elektronen-Synchrotron)
- M. Gaug(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- M. Hayashida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- M. L. Knoetig(ETH Zurich CH-8093 Zurich, Switzerland)
- M. López(Universidad Complutense E-28040 Madrid, Spain)
- M. Makariev(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- M. Mariotti(Università di Padova and INFN I-35131 Padova, Italy)
- M. Martínez(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- M. Meyer(Stockholm University Oskar Klein Center for Cosmoparticle Physics, SE-106 91, Stockholm, Sweden)
- M. Palatiello(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Persic(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Ribó(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- M. Strzys(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. Teshima(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. V. Fonseca(Universidad Complutense E-28040 Madrid, Spain)
- M. Will(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- MAGIC Collaboration
- N. Godinović(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- N. Lewandowska(Universität Würzburg D-97074 Würzburg, Germany)
- N. Mankuzhiyil(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- O. Blanch(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- O. Tibolla(Universität Würzburg D-97074 Würzburg, Germany)
- P. Antoranz(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. Bangale(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Colin(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Da Vela(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. G. Prada Moroni(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- P. Munar-Adrover(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- P. Temnikov(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- P. Vogler(ETH Zurich CH-8093 Zurich, Switzerland)
- R. J. García López(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- R. López-Coto(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- R. Mirzoyan(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. Orito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- R. Paoletti(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- R. Reinthal(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- R. Zanin(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- S. Ansoldi(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- S. Bonnefoy(Universidad Complutense E-28040 Madrid, Spain)
- S. Covino(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. Einecke(Technische Universität Dortmund D-44221 Dortmund, Germany)
- S. Lombardi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. N. Shore(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- S. Paiano(Università di Padova and INFN I-35131 Padova, Italy)
- S. R. Gozzini(Deutsches Elektronen-Synchrotron)
- S. Rügamer(Universität Würzburg D-97074 Würzburg, Germany)
- T. Bretz(Universität Würzburg D-97074 Würzburg, Germany)
- T. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- T. Schweizer(Max-Planck-Institut für Physik D-80805 München, Germany)
- T. Steinbring(Universität Würzburg D-97074 Würzburg, Germany)
- T. Terzić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- T. Toyama(Max-Planck-Institut für Physik D-80805 München, Germany)
- U. Menzel(Max-Planck-Institut für Physik D-80805 München, Germany)
- V. Kadenius(Max-Planck-Institut für Physik D-80805 München, Germany)
- V. Neustroev(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- V. Scalzotto(Università di Padova and INFN I-35131 Padova, Italy)
- V. Scapin(Universidad Complutense E-28040 Madrid, Spain)
- W. Bednarek(University of Łódź PL-90236 Lodz, Poland)
- W. Idec(University of Łódź PL-90236 Lodz, Poland)
- W. Rhode(Technische Universität Dortmund D-44221 Dortmund, Germany)
- X. Paredes-Fortuny(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- Y. Hanabata(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- Y. Konno(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- Publication venue
- Publication date
- Field of study
The MAGIC stereoscopic system collected 69 hours of Crab Nebula data between
October 2009 and April 2011. Analysis of this data sample using the latest
improvements in the MAGIC stereoscopic software provided an unprecedented
precision of spectral and night-by-night light curve determination at gamma
rays. We derived a differential spectrum with a single instrument from 50 GeV
up to almost 30 TeV with 5 bins per energy decade. At low energies, MAGIC
results, combined with Fermi-LAT data, show a flat and broad Inverse Compton
peak. The overall fit to the data between 1 GeV and 30 TeV is not well
described by a log-parabola function. We find that a modified log-parabola
function with an exponent of 2.5 instead of 2 provides a good description of
the data (χ2=35/26). Using systematic uncertainties of red the MAGIC and
Fermi-LAT measurements we determine the position of the Inverse Compton peak to
be at (53 ± 3stat + 31syst -13syst) GeV, which is the most precise
estimation up to date and is dominated by the systematic effects. There is no
hint of the integral flux variability on daily scales at energies above 300 GeV
when systematic uncertainties are included in the flux measurement. We consider
three state- of-the-art theoretical models to describe the overall spectral
energy distribution of the Crab Nebula. The constant B-field model cannot
satisfactorily reproduce the VHE spectral measurements presented in this work,
having particular difficulty reproducing the broadness of the observed IC peak.
Most probably this implies that the assumption of the homogeneity of the
magnetic field inside the nebula is incorrect. On the other hand, the
time-dependent 1D spectral model provides a good fit of the new VHE results
when considering a 80 {\mu}G magnetic field. However, it fails to match the
data when including the morphology of the nebula at lower wavelengths
Multiwavelength observations of Mrk 501 in 2008
- Author
- :(Deutsches Elektronen-Synchrotron)
- :(INAF Osservatorio Astronomico di Torino, I-10025 Pino Torinese)
- A. Babic(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- A. Biland(ETH Zurich CH-8093 Zurich, Switzerland)
- A. Bouvier(Santa Cruz Institute for Particle Physics and Department of Physics University of California, Santa Cruz, CA 95064, USA)
- A. Carosi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. Cesarini(University of Trento Department of Physics, I38050 Povo, Trento, Italy)
- A. De Angelis(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- A. Domínguez(Inst. de Astrofísica de Andalucía)
- A. Falcone(Department of Astronomy and Astrophysics 525 Davey Lab, Pennsylvania State University, University Park, PA 16802, USA)
- A. Furniss(Santa Cruz Institute for Particle Physics and Department of Physics University of California, Santa Cruz, CA 95064, USA)
- A. González Muñoz(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- A. Hadamek(Technische Universität Dortmund D-44221 Dortmund, Germany)
- A. Herrero(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- A. La Barbera(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. Lahtenmaki(Aalto University Metsähovi Radio Observatory Metsähovintie 114 FIN-02540 Kylmälä Finland)
- A. López-Oramas(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- A. Moralejo(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- A. N. Otte(School of Physics and Center for Relativistic Astrophysics Georgia Institute of Technology, 837 State Street NW, Atlanta, GA 30332-0430)
- A. Niedzwiecki(University of Lodz PL-90236 Lodz, Poland)
- A. O'Faoláin de Bhróithe(School of Physics University College Dublin, Belfield, Dublin 4, Ireland)
- A. Overkemping(Technische Universität Dortmund D-44221 Dortmund, Germany)
- A. Pichel(Instituto de Astronomia y Fisica del Espacio Casilla de Correo 67 - Sucursal 28)
- A. Popkow(Department of Physics and Astronomy University of California, Los Angeles, CA 90095, USA)
- A. S Madhavan(Department of Physics and Astronomy Iowa State University, Ames, IA 50011, USA)
- A. Saggion(Università di Padova and INFN I-35131 Padova, Italy)
- A. Sillanpää(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- A. Stamerra(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. Treves(Università dell'Insubria Como, I-22100 Como, Italy)
- A. Varlotta(Department of Physics Purdue University, West Lafayette, IN 47907, USA)
- A. W. Smith(Department of Physics and Astronomy University of Utah, Salt Lake City, UT 84112, USA)
- A. Zajczyk(Department of Physics Washington University, St. Louis, MO 63130, USA)
- B. Behera(Deutsches Elektronen-Synchrotron)
- B. De Lotto(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- B. Jordan(School of Cosmic Physics Dublin Institute For Advanced Studies, Ireland)
- B. Marcote(Universitat de Barcelona)
- B. Zitzer(Argonne National Laboratory 9700 S. Cass Avenue, Argonne, IL 60439, USA)
- C. A. Johnson(Santa Cruz Institute for Particle Physics and Department of Physics University of California, Santa Cruz, CA 95064, USA)
- C. Delgado Mendez(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- C. Duke(Department of Physics Grinnell College, Grinnell, IA 50112-1690, USA)
- C. Fruck(Max-Planck-Institut für Physik D-80805 München, Germany)
- C. M. Raiteri(INAF Osservatorio Astronomico di Torino, I-10025 Pino Torinese)
- C. S. Buemi(INAF - Osservatorio Astrofisico di Catania Italy)
- C. Schultz(Università di Padova and INFN I-35131 Padova, Italy)
- C. Trigilio(INAF - Osservatorio Astrofisico di Catania Italy)
- D. A. Williams(Santa Cruz Institute for Particle Physics and Department of Physics University of California, Santa Cruz, CA 95064, USA)
- D. Carreto Fidalgo(Universität Würzburg D-97074 Würzburg, Germany)
- D. Dominis Prester(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Dorner(Universität Würzburg D-97074 Würzburg, Germany)
- D. Eisenacher(Universität Würzburg D-97074 Würzburg, Germany)
- D. Elsaesser(Universität Würzburg D-97074 Würzburg, Germany)
- D. F. Torres(Institut de Ciències de l'Espai)
- D. Ferenc(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Garrido Terrats(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- D. Hadasch(Institut de Ciències de l'Espai)
- D. Hanna(Physics Department McGill University, Montreal, QC H3A 2T8, Canada)
- D. Hildebrand(ETH Zurich CH-8093 Zurich, Switzerland)
- D. Hrupec(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Kieda(Department of Physics and Astronomy University of Utah, Salt Lake City, UT 84112, USA)
- D. Lelas(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Mazin(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Nakajima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- D. Nieto(Physics Department Columbia University, New York, NY 10027, USA)
- D. Paneque(6 *)
- D. Sobczynska(University of Lodz PL-90236 Lodz, Poland)
- D. Staszak(Physics Department McGill University, Montreal, QC H3A 2T8, Canada)
- D. Tescaro(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. Bernardini(Deutsches Elektronen-Synchrotron)
- E. Carmona(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- E. Collins-Hughes(School of Physics University College Dublin, Belfield, Dublin 4, Ireland)
- E. Colombo(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. Farina(Università dell'Insubria Como, I-22100 Como, Italy)
- E. Koptelova(Graduate Institute of Astronomy National Central University, 300 Jhongda Rd., Jhongli 32001, Taiwan)
- E. Lindfors(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- E. Lorenz(Max-Planck-Institut für Physik D-80805 München, Germany)
- E. N. Kopatskaya(Astron. Inst. St.-Petersburg State Univ., Russia)
- E. Nieppola(Aalto University Metsähovi Radio Observatory Metsähovintie 114 FIN-02540 Kylmälä Finland)
- E. Prandini(Università di Padova and INFN I-35131 Padova, Italy)
- E. Roache(Fred Lawrence Whipple Observatory Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645, USA)
- External Collaborators(INAF Osservatorio Astronomico di Torino, I-10025 Pino Torinese)
- F. Borracci(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. Dazzi(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- F. Prada(Inst. de Astrofísica de Andalucía)
- F. Sheidaei(Department of Physics and Astronomy University of Utah, Salt Lake City, UT 84112, USA)
- F. Spanier(Universität Würzburg D-97074 Würzburg, Germany)
- F. Tavecchio(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- F. Zandanel(Inst. de Astrofísica de Andalucía)
- G. Bonnoli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- G. De Caneva(Deutsches Elektronen-Synchrotron)
- G. Giavitto(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- G. Gyuk(Astronomy Department Adler Planetarium and Astronomy Museum, Chicago, IL 60605, USA)
- G. H. Gillanders(School of Physics National University of Ireland Galway, University Road, Galway, Ireland)
- G. H. Sembroski(Department of Physics Purdue University, West Lafayette, IN 47907, USA)
- G. Maier(Deutsches Elektronen-Synchrotron)
- G. Maneva(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- G. N. Kimeridze(Abastumani Observatory Mt. Kanobili, 0301 Abastumani, Georgia)
- G. Ratliff(Astronomy Department Adler Planetarium and Astronomy Museum, Chicago, IL 60605, USA)
- G. T. Richards(School of Physics and Center for Relativistic Astrophysics Georgia Institute of Technology, 837 State Street NW, Atlanta, GA 30332-0430)
- G. Umana(INAF - Osservatorio Astrofisico di Catania Italy)
- H. D. Aller(Department of Astronomy University of Michigan, Ann Arbor, MI 48109-1042, USA)
- H. Kellermann(Max-Planck-Institut für Physik D-80805 München, Germany)
- H. Krawczynski(Department of Physics Washington University, St. Louis, MO 63130, USA)
- H. Prokoph(Deutsches Elektronen-Synchrotron)
- H. Y. Hsiao(Graduate Institute of Astronomy National Central University, 300 Jhongda Rd., Jhongli 32001, Taiwan)
- I. Lozano(Universidad Complutense E-28040 Madrid, Spain)
- I. Puljak(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- I. Snidaric(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- I. Telezhinsky(Institute of Physics and Astronomy University of Potsdam, 14476 Potsdam-Golm, Germany)
- J. A. Barrio(Universidad Complutense E-28040 Madrid, Spain)
- J. Aleksić(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- J. Becerra González(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Cortina(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- J. Dumm(School of Physics and Astronomy University of Minnesota, Minneapolis, MN 55455, USA)
- J. Grube(Astronomy Department Adler Planetarium and Astronomy Museum, Chicago, IL 60605, USA)
- J. Holder(Department of Physics and Astronomy and the Bartol Research Institute University of Delaware, Newark, DE 19716, USA)
- J. Hose(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Krause(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Kushida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- J. L. Contreras(Universidad Complutense E-28040 Madrid, Spain)
- J. M. Miranda(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- J. M. Paredes(Universitat de Barcelona)
- J. P. Finley(Department of Physics Purdue University, West Lafayette, IN 47907, USA)
- J. Quinn(School of Physics University College Dublin, Belfield, Dublin 4, Ireland)
- J. Rajotte(Physics Department McGill University, Montreal, QC H3A 2T8, Canada)
- J. Rico(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- J. Rodriguez Garcia(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Sainio(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- J. Sitarek(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- J. Storz(Universität Würzburg D-97074 Würzburg, Germany)
- J. Thaele(Technische Universität Dortmund D-44221 Dortmund, Germany)
- J. Tyler(Physics Department McGill University, Montreal, QC H3A 2T8, Canada)
- K. Berger(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- K. Berger(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- K. Frantzen(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Mallot(Deutsches Elektronen-Synchrotron)
- K. Mannheim(Universität Würzburg D-97074 Würzburg, Germany)
- K. Meagher(School of Physics and Center for Relativistic Astrophysics Georgia Institute of Technology, 837 State Street NW, Atlanta, GA 30332-0430)
- K. Nilsson(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- K. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Satalecka(7 *)
- K. Shahinyan(School of Physics and Astronomy University of Minnesota, Minneapolis, MN 55455, USA)
- L. A. Antonelli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. C. Reyes(Physics Department California Polytechnic State University, San Luis Obispo, CA 94307, USA)
- L. Ciupik(Astronomy Department Adler Planetarium and Astronomy Museum, Chicago, IL 60605, USA)
- L. Font(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- L. Fortson(School of Physics and Astronomy University of Minnesota, Minneapolis, MN 55455, USA)
- L. Fuhrmann(Max-Planck-Institut für Radioastronomie Auf dem Hügel 69, 53121 Bonn, Germany)
- L. Maraschi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. Takalo(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- M. Ajello(Space Sciences Laboratory 7 Gauss Way, University of California, Berkeley, CA 94720-7450, USA)
- M. Beilicke(Department of Physics Washington University, St. Louis, MO 63130, USA)
- M. Cerruti(Fred Lawrence Whipple Observatory Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645, USA)
- M. Doert(Technische Universität Dortmund D-44221 Dortmund, Germany)
- M. Doro(Università di Padova and INFN I-35131 Padova, Italy)
- M. F. Aller(Department of Astronomy University of Michigan, Ann Arbor, MI 48109-1042, USA)
- M. G. Nikolashvili(Abastumani Observatory Mt. Kanobili, 0301 Abastumani, Georgia)
- M. Garczarczyk(Deutsches Elektronen-Synchrotron)
- M. Gaug(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- M. Giroletti(INAF Istituto di Radioastronomia 40129 Bologna, Italy)
- M. J. Lang(School of Physics National University of Ireland Galway, University Road, Galway, Ireland)
- M. Kertzman(Department of Physics and Astronomy DePauw University, Greencastle, IN 46135-0037, USA)
- M. L. Knoetig(ETH Zurich CH-8093 Zurich, Switzerland)
- M. López(Universidad Complutense E-28040 Madrid, Spain)
- M. Makariev(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- M. Mariotti(Università di Padova and INFN I-35131 Padova, Italy)
- M. Martínez(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- M. Meucci(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- M. Palatiello(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Perri(ASI-Science Data Center Via del Politecnico, I-00133 Rome, Italy)
- M. Persic(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Pohl(Institute of Physics and Astronomy University of Potsdam, 14476 Potsdam-Golm, Germany)
- M. Ribó(Universitat de Barcelona)
- M. Salvati(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- M. Teshima(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. Theiling(Department of Physics Purdue University, West Lafayette, IN 47907, USA)
- M. Tornikoski(Aalto University Metsähovi Radio Observatory Metsähovintie 114 FIN-02540 Kylmälä Finland)
- M. Uellenbeck(Technische Universität Dortmund D-44221 Dortmund, Germany)
- M. V. Fonseca(Universidad Complutense E-28040 Madrid, Spain)
- M. Villata(INAF Osservatorio Astronomico di Torino, I-10025 Pino Torinese)
- MAGIC Collaboration
- N. Galante(Fred Lawrence Whipple Observatory Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645, USA)
- N. Godinović(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- N. Lewandowska(Universität Würzburg D-97074 Würzburg, Germany)
- N. Mankuzhiyil(2 *)
- N. Nowak(Max-Planck-Institut für Physik D-80805 München, Germany)
- N. V. Efimova(Astron. Inst. St.-Petersburg State Univ., Russia)
- O. Blanch(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- O. M. Kurtanidze(Abastumani Observatory Mt. Kanobili, 0301 Abastumani, Georgia)
- O. Tibolla(Universität Würzburg D-97074 Würzburg, Germany)
- P. Antoranz(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. Bangale(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Colin(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Da Vela(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. G. Prada Moroni(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- P. Kaaret(Department of Physics and Astronomy University of Iowa, Van Allen Hall, Iowa City, IA 52242, USA)
- P. Leto(INAF - Osservatorio Astrofisico di Catania Italy)
- P. Majumdar(Department of Physics and Astronomy University of California, Los Angeles, CA 90095, USA)
- P. Moriarty(Department of Life and Physical Sciences Galway-Mayo Institute of Technology, Dublin Road, Galway, Ireland)
- P. Munar-Adrover(Universitat de Barcelona)
- P. T. Reynolds(Department of Applied Physics and Instrumentation Cork Institute of Technology, Bishopstown, Cork, Ireland)
- P. Temnikov(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- P. Vogler(ETH Zurich CH-8093 Zurich, Switzerland)
- Q. Feng(Department of Physics Purdue University, West Lafayette, IN 47907, USA)
- R. A. Ong(Department of Physics and Astronomy University of California, Los Angeles, CA 90095, USA)
- R. Bird(School of Physics University College Dublin, Belfield, Dublin 4, Ireland)
- R. J. García López(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- R. K. Bock(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. López-Coto(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- R. M. Wagner(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. Mirzoyan(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. Mukherjee(Department of Physics and Astronomy Barnard College, Columbia University, NY 10027, USA)
- R. Orito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- R. Paoletti(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- R. Reinthal(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- R. Welsing(Deutsches Elektronen-Synchrotron)
- R. Zanin(Universitat de Barcelona)
- S. Ansoldi(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- S. Bonnefoy(Universidad Complutense E-28040 Madrid, Spain)
- S. Covino(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. Einecke(Technische Universität Dortmund D-44221 Dortmund, Germany)
- S. Federici(now at GRAPPA Institute University of Amsterdam, 1098XH)
- S. Griffin(Physics Department McGill University, Montreal, QC H3A 2T8, Canada)
- S. Lombardi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. N. Shore(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- S. P. Wakely(Enrico Fermi Institute University of Chicago, Chicago, IL 60637, USA)
- S. Paiano(Università di Padova and INFN I-35131 Padova, Italy)
- S. Partini(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- S. Preziuso(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- S. R. Gozzini(Deutsches Elektronen-Synchrotron)
- S. Rügamer(Universität Würzburg D-97074 Würzburg, Germany)
- S. Sun(Max-Planck-Institut für Physik D-80805 München, Germany)
- S. T. Griffiths(Department of Physics and Astronomy University of Iowa, Van Allen Hall, Iowa City, IA 52242, USA)
- S. Vincent(Deutsches Elektronen-Synchrotron)
- T. Bretz(Universität Würzburg D-97074 Würzburg, Germany)
- T. C. Weekes(Fred Lawrence Whipple Observatory Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645, USA)
- T. S. Konstantinova(Astron. Inst. St.-Petersburg State Univ., Russia)
- T. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- T. Schweizer(Max-Planck-Institut für Physik D-80805 München, Germany)
- T. Steinbring(Universität Würzburg D-97074 Würzburg, Germany)
- T. Surić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- T. Terzić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- T. Toyama(Max-Planck-Institut für Physik D-80805 München, Germany)
- U. Barres de Almeida(Max-Planck-Institut für Physik D-80805 München, Germany)
- U. Menzel(Max-Planck-Institut für Physik D-80805 München, Germany)
- V. Bugaev(Department of Physics Washington University, St. Louis, MO 63130, USA)
- V. Kadenius(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- V. Kadenius(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- V. M. Larionov(Astron. Inst. St.-Petersburg State Univ., Russia)
- V. Scalzotto(Università di Padova and INFN I-35131 Padova, Italy)
- V. Scapin(Universidad Complutense E-28040 Madrid, Spain)
- V. Stamatescu(IFAE Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain)
- VERITAS Collaboration(Deutsches Elektronen-Synchrotron)
- W. Bednarek(University of Lodz PL-90236 Lodz, Poland)
- W. Benbow(Fred Lawrence Whipple Observatory Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645, USA)
- W. Cui(Department of Physics Purdue University, West Lafayette, IN 47907, USA)
- W. Idec(University of Lodz PL-90236 Lodz, Poland)
- W. P. Chen(Graduate Institute of Astronomy National Central University, 300 Jhongda Rd., Jhongli 32001, Taiwan)
- W. Rhode(Technische Universität Dortmund D-44221 Dortmund, Germany)
- X. Chen(Institute of Physics and Astronomy University of Potsdam, 14476 Potsdam-Golm, Germany)
- X. Paredes-Fortuny(Universitat de Barcelona)
- Y. Y. Kovalev(Max-Planck-Institut für Radioastronomie Auf dem Hügel 69, 53121 Bonn, Germany)
- Yu. A. Kovalev(Astro Space Center of the Lebedev Physical Institute 117997)
- Publication venue
- Publication date
- Field of study
Mrk 501 is one of the brightest blazars at TeV energies and has been
extensively studied since its first VHE detection in 1996. Our goal is to
characterize in detail the source gamma-ray emission, together with the
radio-to-X-ray emission, during the non-flaring (low) activity, which is less
often studied than the occasional flaring (high) activity. We organized a
multiwavelength (MW) campaign on Mrk 501 between March and May 2008. This
multi-instrument effort included the most sensitive VHE gamma-ray instruments
in the northern hemisphere, namely the imaging atmospheric Cherenkov telescopes
MAGIC and VERITAS, as well as Swift, RXTE, the F-GAMMA, GASP-WEBT, and other
collaborations and instruments. Mrk 501 was found to be in a low state of
activity during the campaign, with a VHE flux in the range of 10%-20% of the
Crab nebula flux. Nevertheless, significant flux variations were detected with
various instruments, with a trend of increasing variability with energy. The
broadband spectral energy distribution during the two different emission states
of the campaign can be adequately described within the homogeneous one-zone
synchrotron self-Compton model, with the (slightly) higher state described by
an increase in the electron number density. This agrees with previous studies
of the broadband emission of this source during flaring and non-flaring states.
We report for the first time a tentative X-ray-to-VHE correlation during a low
VHE activity. Although marginally significant, this positive correlation
between X-ray and VHE, which has been reported many times during flaring
activity, suggests that the mechanisms that dominate the X-ray/VHE emission
during non-flaring-activity are not substantially different from those that are
responsible for the emission during flaring activity
Black hole lightning due to particle acceleration at subhorizon scales
- Author
- A. Babic(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- A. Biland(ETH Zurich CH-8093 Zurich, Switzerland)
- A. Carosi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. De Angelis(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- A. González Muñoz(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. La Barbera(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. López-Oramas(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Moralejo(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Niedzwiecki(University of Łódź PL-90236 Lodz, Poland)
- A. Overkemping(Technische Universität Dortmund D-44221 Dortmund, Germany)
- A. Sillanpää(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- A. Stamerra(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. Treves(Università dell'Insubria and INFN Milano Bicocca Como, I-22100 Como, Italy)
- B. Biasuzzi(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- B. De Lotto(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- B. Marcote(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- C. Delgado Mendez(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- C. Fruck(Max-Planck-Institut für Physik D-80805 München, Germany)
- C. Schultz(Università di Padova and INFN I-35131 Padova, Italy)
- D. Dominis Prester(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Dorner(Universität Würzburg D-97074 Würzburg, Germany)
- D. Eisenacher(Universität Würzburg D-97074 Würzburg, Germany)
- D. Elsaesser(Universität Würzburg D-97074 Würzburg, Germany)
- D. F. Torres(ICREA and Institute of Space Sciences E-08193 Barcelona, Spain)
- D. Galindo(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- D. Garrido Terrats(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- D. Hadasch(Institute of Space Sciences E-08193 Barcelona, Spain)
- D. Hildebrand(ETH Zurich CH-8093 Zurich, Switzerland)
- D. Hrupec(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Lelas(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Mazin(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Nakajima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- D. Paneque(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Sobczynska(University of Łódź PL-90236 Lodz, Poland)
- D. Tescaro(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. Bernardini(Deutsches Elektronen-Synchrotron)
- E. Carmona(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- E. Colombo(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. de Oña Wilhelmi(Institute of Space Sciences E-08193 Barcelona, Spain)
- E. Lindfors(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- E. Lorenz(Max-Planck-Institut für Physik D-80805 München, Germany)
- E. Prandini(ETH Zurich CH-8093 Zurich, Switzerland)
- E. Ros(Max-Planck-Institut für Radioastronomie D-53121 Bonn, German)
- F. Borracci(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. Dazzi(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. Krauß(Universität Würzburg D-97074 Würzburg, Germany)
- F. Longo(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- F. Spanier(Universität Würzburg D-97074 Würzburg, Germany)
- F. Tavecchio(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- G. Bonnoli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- G. De Caneva(Deutsches Elektronen-Synchrotron)
- G. Maneva(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- H. Kellermann(Max-Planck-Institut für Physik D-80805 München, Germany)
- H. Kubo(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- H. Takami(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- I. Lozano(Universidad Complutense E-28040 Madrid, Spain)
- I. Puljak(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- I. Snidaric(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- J. A. Barrio(Universidad Complutense E-28040 Madrid, Spain)
- J. Aleksić(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Becerra González(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Cortina(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Herrera(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Hose(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Krause(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Kushida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- J. L. Contreras(Universidad Complutense E-28040 Madrid, Spain)
- J. M. Miranda(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- J. M. Paredes(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- J. Poutanen(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- J. Rico(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Rodriguez Garcia(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Sitarek(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Storz(Universität Würzburg D-97074 Würzburg, Germany)
- J. Thaele(Technische Universität Dortmund D-44221 Dortmund, Germany)
- J. Wilms(Dr. Remeis-Sternwarte Bamberg Astronomisches Institut der Universität Erlangen-Nürnberg, ECAP, D-96049 Bamberg, Germany)
- K. Frantzen(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Kodani(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Mallot(Deutsches Elektronen-Synchrotron)
- K. Mannheim(Universität Würzburg D-97074 Würzburg, Germany)
- K. Nilsson(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- K. Nishijima(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Noda(Max-Planck-Institut für Physik D-80805 München, Germany)
- K. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- K. Satalecka(Universidad Complutense E-28040 Madrid, Spain)
- L. A. Antonelli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. Font(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- L. Maraschi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. Takalo(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- M. Doro(Università di Padova and INFN I-35131 Padova, Italy)
- M. Garczarczyk(Deutsches Elektronen-Synchrotron)
- M. Gaug(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- M. Hayashida(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- M. Kadler(Universität Würzburg D-97074 Würzburg, Germany)
- M. López(Universidad Complutense E-28040 Madrid, Spain)
- M. Makariev(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- M. Mariotti(Università di Padova and INFN I-35131 Padova, Italy)
- M. Martínez(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- M. Palatiello(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Persic(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Ribó(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- M. Strzys(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. Teshima(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. Uellenbeck(Technische Universität Dortmund D-44221 Dortmund, Germany)
- M. V. Fonseca(Universidad Complutense E-28040 Madrid, Spain)
- MAGIC Collaboration
- N. Godinović(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- N. Lewandowska(Universität Würzburg D-97074 Würzburg, Germany)
- N. Mankuzhiyil(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- O. Blanch(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- O. Tibolla(Universität Würzburg D-97074 Würzburg, Germany)
- P. Antoranz(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. Bangale(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Colin(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Da Vela(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. G. Prada Moroni(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- P. Munar-Adrover(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- P. Temnikov(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- P. Vogler(ETH Zurich CH-8093 Zurich, Switzerland)
- R. J. García López(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- R. López-Coto(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- R. Mirzoyan(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. Orito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- R. Paoletti(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- R. Reinthal(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- R. Schulz(Universität Würzburg D-97074 Würzburg, Germany)
- R. Zanin(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- S. Ansoldi(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- S. Bonnefoy(Universidad Complutense E-28040 Madrid, Spain)
- S. Covino(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. Einecke(Technische Universität Dortmund D-44221 Dortmund, Germany)
- S. Lombardi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. N. Shore(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- S. Paiano(Università di Padova and INFN I-35131 Padova, Italy)
- S. R. Gozzini(Deutsches Elektronen-Synchrotron)
- S. Rügamer(Universität Würzburg D-97074 Würzburg, Germany)
- T. Bretz(Universität Würzburg D-97074 Würzburg, Germany)
- T. Saito(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- T. Schweizer(Max-Planck-Institut für Physik D-80805 München, Germany)
- T. Steinbring(Universität Würzburg D-97074 Würzburg, Germany)
- T. Terzić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- T. Toyama(Max-Planck-Institut für Physik D-80805 München, Germany)
- U. Bach(Max-Planck-Institut für Radioastronomie D-53121 Bonn, German)
- U. Menzel(Max-Planck-Institut für Physik D-80805 München, Germany)
- V. Kadenius(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- V. Scalzotto(Università di Padova and INFN I-35131 Padova, Italy)
- V. Scapin(Universidad Complutense E-28040 Madrid, Spain)
- V. Stamatescu(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- W. Bednarek(University of Łódź PL-90236 Lodz, Poland)
- W. Idec(University of Łódź PL-90236 Lodz, Poland)
- W. Rhode(Technische Universität Dortmund D-44221 Dortmund, Germany)
- X. Paredes-Fortuny(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- Y. Hanabata(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- Y. Konno(Japanese MAGIC Consortium Division of Physics and Astronomy, Kyoto University, Japan)
- Publication venue
- Publication date
- Field of study
Supermassive black holes with masses of millions to billions of solar masses
are commonly found in the centers of galaxies. Astronomers seek to image jet
formation using radio interferometry, but still suffer from insufficient
angular resolution. An alternative method to resolve small structures is to
measure the time variability of their emission. Here, we report on gamma-ray
observations of the radio galaxy IC 310 obtained with the MAGIC telescopes
revealing variability with doubling time scales faster than 4.8 min. Causality
constrains the size of the emission region to be smaller than 20\% of the
gravitational radius of its central black hole. We suggest that the emission is
associated with pulsar-like particle acceleration by the electric field across
a magnetospheric gap at the base of the radio jet
Very-high-energy γ-ray observations of novae and dwarf novae with the MAGIC telescopes
- Author
- A. Babic(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- A. Biland(ETH Zurich CH-8093 Zurich, Switzerland)
- A. Carosi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. Chatterjee(Saha Institute of Nuclear Physics 1/AF Bidhannagar, Salt Lake, Sector-1, Kolkata 700064, India)
- A. De Angelis(Università di Padova and INFN I-35131 Padova, Italy)
- A. Fernández-Barral(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. González Muñoz(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. La Barbera(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. López-Oramas(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Moralejo(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. Niedzwiecki(University of Łódź PL-90236 Lodz, Poland)
- A. Overkemping(Technische Universität Dortmund D-44221 Dortmund, Germany)
- A. Sillanpää(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- A. Stamerra(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. Treves(Università dell'Insubria and INFN Milano Bicocca Como, I-22100 Como, Italy)
- B. Banerjee(Saha Institute of Nuclear Physics 1/AF Bidhannagar, Salt Lake, Sector-1, Kolkata 700064, India)
- B. Biasuzzi(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- B. De Lotto(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- B. Marcote(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- C. Delgado Mendez(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- C. Fruck(Max-Planck-Institut für Physik D-80805 München, Germany)
- C. Schultz(Università di Padova and INFN I-35131 Padova, Italy)
- D. Dominis Prester(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Dorner(Universität Würzburg D-97074 Würzburg, Germany)
- D. Eisenacher Glawion(Universität Würzburg D-97074 Würzburg, Germany)
- D. Elsaesser(Universität Würzburg D-97074 Würzburg, Germany)
- D. F. Torres(ICREA and Institute of Space Sciences E-08193 Barcelona, Spain)
- D. Fidalgo(Universidad Complutense E-28040 Madrid, Spain)
- D. Galindo(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- D. Garrido Terrats(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- D. Guberman(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- D. Hrupec(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Lelas(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- D. Mazin(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Nakajima(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- D. Paneque(Max-Planck-Institut für Physik D-80805 München, Germany)
- D. Sobczynska(University of Łódź PL-90236 Lodz, Poland)
- D. Tescaro(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. Bernardini(Deutsches Elektronen-Synchrotron)
- E. Carmona(Centro de Investigaciones Energéticas Medioambientales y Tecnológicas, E-28040 Madrid, Spain)
- E. Colombo(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- E. de Oña Wilhelmi(Institute of Space Sciences E-08193 Barcelona, Spain)
- E. Hays(NASA Goddard Space Flight Center Greenbelt, MD 20771, USA)
- E. Lindfors(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- E. Lorenz(Max-Planck-Institut für Physik D-80805 München, Germany)
- E. Prandini(ETH Zurich CH-8093 Zurich, Switzerland)
- F. Borracci(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. Dazzi(Max-Planck-Institut für Physik D-80805 München, Germany)
- F. Di Pierro(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- F. Longo(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- F. Tavecchio(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- G. Bonnoli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- G. De Caneva(Deutsches Elektronen-Synchrotron)
- G. Hughes(ETH Zurich CH-8093 Zurich, Switzerland)
- G. Maneva(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- H. Kellermann(Max-Planck-Institut für Physik D-80805 München, Germany)
- H. Kubo(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- H. Takami(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- I. Puljak(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- I. Snidaric(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- I. Vovk(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. A. Barrio(Universidad Complutense E-28040 Madrid, Spain)
- J. Becerra González(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Cortina(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Herrera(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- J. Hose(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Kushida(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- J. L. Contreras(Universidad Complutense E-28040 Madrid, Spain)
- J. M. Miranda(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- J. M. Paredes(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- J. Palacio(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Poutanen(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- J. Rico(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- J. Rodriguez Garcia(Max-Planck-Institut für Physik D-80805 München, Germany)
- J. Sitarek(University of Łódź PL-90236 Lodz, Poland)
- J. Thaele(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Frantzen(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Kodani(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- K. Mallot(Deutsches Elektronen-Synchrotron)
- K. Mannheim(Universität Würzburg D-97074 Würzburg, Germany)
- K. Nilsson(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- K. Nishijima(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- K. Noda(Max-Planck-Institut für Physik D-80805 München, Germany)
- K. Saito(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- K. Satalecka(Universidad Complutense E-28040 Madrid, Spain)
- L. A. Antonelli(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. Font(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- L. Maraschi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- L. Takalo(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- M. Doro(Università di Padova and INFN I-35131 Padova, Italy)
- M. Garczarczyk(Deutsches Elektronen-Synchrotron)
- M. Gaug(Unitat de Física de les Radiacions Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain)
- M. Hayashida(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- M. L. Ahnen(ETH Zurich CH-8093 Zurich, Switzerland)
- M. López(Universidad Complutense E-28040 Madrid, Spain)
- M. Makariev(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- M. Manganaro(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- M. Mariotti(Università di Padova and INFN I-35131 Padova, Italy)
- M. Martínez(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- M. Nievas Rosillo(Universidad Complutense E-28040 Madrid, Spain)
- M. Palatiello(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Persic(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- M. Ribó(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- M. Strzys(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. Teshima(Max-Planck-Institut für Physik D-80805 München, Germany)
- M. V. Fonseca(Universidad Complutense E-28040 Madrid, Spain)
- M. Will(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- MAGIC Collaboration
- N. Godinović(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- N. Lewandowska(Universität Würzburg D-97074 Würzburg, Germany)
- O. Blanch(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- P. Antoranz(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. Bangale(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Colin(Max-Planck-Institut für Physik D-80805 München, Germany)
- P. Da Vela(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- P. G. Prada Moroni(Università di Pisa and INFN Pisa, I-56126 Pisa, Italy)
- P. Giammaria(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- P. Majumdar(Saha Institute of Nuclear Physics 1/AF Bidhannagar, Salt Lake, Sector-1, Kolkata 700064, India)
- P. Temnikov(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- R. Clavero(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. Desiante(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- R. J. García López(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain)
- R. López-Coto(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- R. Mirzoyan(Max-Planck-Institut für Physik D-80805 München, Germany)
- R. Orito(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- R. Paoletti(Università di Siena and INFN Pisa, I-53100 Siena, Italy)
- R. Reinthal(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- R. Zanin(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- S. Ansoldi(Università di Udine and INFN Trieste, I-33100 Udine, Italy)
- S. Bonnefoy(Universidad Complutense E-28040 Madrid, Spain)
- S. Covino(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. Einecke(Technische Universität Dortmund D-44221 Dortmund, Germany)
- S. Lombardi(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- S. Paiano(Università di Padova and INFN I-35131 Padova, Italy)
- T. Bretz(Universität Würzburg D-97074 Würzburg, Germany)
- T. Saito(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- T. Schweizer(Max-Planck-Institut für Physik D-80805 München, Germany)
- T. Steinbring(Universität Würzburg D-97074 Würzburg, Germany)
- T. Terzić(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia)
- T. Toyama(Max-Planck-Institut für Physik D-80805 München, Germany)
- U. Barres de Almeida(Max-Planck-Institut für Physik D-80805 München, Germany)
- U. Menzel(Max-Planck-Institut für Physik D-80805 München, Germany)
- V. Neustroev(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- V. Scapin(Universidad Complutense E-28040 Madrid, Spain)
- V. Verguilov(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- W. Bednarek(University of Łódź PL-90236 Lodz, Poland)
- W. Idec(University of Łódź PL-90236 Lodz, Poland)
- W. Rhode(Technische Universität Dortmund D-44221 Dortmund, Germany)
- X. Paredes-Fortuny(Universitat de Barcelona ICC, IEEC-UB, E-08028 Barcelona, Spain)
- Y. Hanabata(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- Y. Konno(Japanese MAGIC Consortium ICRR, The University of Tokyo, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, KEK, Japan)
- Publication venue
- Publication date
- Field of study
Context. In the last five years the Fermi Large Area Telescope (LAT)
instrument detected GeV {\gamma}-ray emission from five novae. The GeV emission
can be interpreted in terms of an inverse Compton process of electrons
accelerated in a shock. In this case it is expected that protons in the same
conditions can be accelerated to much higher energies. Consequently they may
produce a second component in the {\gamma}-ray spectrum at TeV energies. Aims.
We aim to explore the very-high-energy domain to search for {\gamma}-ray
emission above 50 GeV and to shed light on the acceleration process of leptons
and hadrons in nova explosions. Methods. We have performed observations with
the MAGIC telescopes of the classical nova V339 Del shortly after the 2013
outburst, triggered by optical and subsequent GeV {\gamma}-ray detec- tions. We
also briefly report on VHE observations of the symbiotic nova YY Her and the
dwarf nova ASASSN-13ax. We complement the TeV MAGIC observations with the
analysis of con- temporaneous Fermi-LAT data of the sources. The TeV and GeV
observations are compared in order to evaluate the acceleration parameters for
leptons and hadrons. Results. No significant TeV emission was found from the
studied sources. We computed upper limits on the spectrum and night-by-night
flux. The combined GeV and TeV observations of V339 Del limit the ratio of
proton to electron luminosities to Lp<~0.15 Le
- …