30 research outputs found
On a new Near-Infrared method to estimate the absolute ages of star clusters: NGC3201 as a first test case
- Author
- A. Calamida(ESO)
- A. Di Cecco(UniToV)
- A. M. Piersimoni(INAF-OACTe)
- A. R. Walker(IAC)
- D. A. VandenBerg(UVIC)
- E. Marchetti(ESO)
- F. Caputo(INAF/OAR)
- G. BonoUniToV
- G. Iannicola(INAF/OAR)
- I. Ferraro(INAF/OAR)
- J. Melnick(ESO)
- J. Storm(AIP)
- L. Pulone(INAF/OAR)
- M. Dall'Ora(INAF/OACN)
- M. Monelli(INAF/OACN)
- M. Nonino(INAF/OAT)
- M. Romaniello(ESO)
- M. Zoccali(Univ. Concepcion)
- N. Sanna(UniToV)
- P. Amico(ESO)
- P. B. Stetson(HIA-NRC)
- P. G. Prada Moroni(Astrophys. In. Potsdam)
- R. Buonanno(UniToV)
- R. Gilmozzi(ESO)
- S. D'Odorico(ESO)
- S. Degl'Innocenti(Astrophys. In. Potsdam)
- S. Ortolani(Univ. of Padova)
- Publication venue
- Publication date
- Field of study
We present a new method to estimate the absolute ages of stellar systems.
This method is based on the difference in magnitude between the main sequence
turn-off (MSTO) and a well defined knee located along the lower main sequence
(MSK). This feature is caused by the collisionally induced absorption of
molecular hydrogen and it can be easily identified in near-infrared (NIR) and
in optical-NIR color-magnitude diagrams of stellar systems. We took advantage
of deep and accurate NIR images collected with the Multi-Conjugate Adaptive
Optics Demonstrator temporarily available on the Very Large Telescope and of
optical images collected with the Advanced Camera for Surveys Wide Field Camera
on the Hubble Space Telescope and with ground-based telescopes to estimate the
absolute age of the globular NGC3201 using both the MSTO and the
Delta(MSTO-MSK). We have adopted a new set of cluster isochrones and we found
that the absolute ages based on the two methods agree to within one sigma.
However, the errors of the ages based on the Delta(MSTO-MSK) method are
potentially more than a factor of two smaller, since they are not affected by
uncertainties in cluster distance or reddening.Current isochrones appear to
predict slightly bluer (~0.05mag) NIR and optical-NIR colors than observed for
magnitudes fainter than the MSK
Mirror Development for the Cherenkov Telescope Array
- Author
- A. Bonardi(IAAT Universität Tübingen, Tübingen, Germany)
- A. FörsterMax-Planck-Institut für Kernphysik Heidelberg, Germany
- A. Nozato(Kinki University Japan)
- A. Wörnlein(ECAP Universität Erlangen-Nürnberg, Erlangen, Germany)
- B. Peyaud(CEA Irfu, Centre de Saclay, Gif-sur-Yvette, France)
- C. Jeanney(CEA Irfu, Centre de Saclay, Gif-sur-Yvette, France)
- C. Medina(Instituto Argentino de Radioastronomia CCT La Plata-CONICET, Argentina)
- C. Schultz(University of Padova and INFN sezione di Padova Padova, Italy)
- C. Van Eldik(ECAP Universität Erlangen-Nürnberg, Erlangen, Germany)
- D. Durand(CEA Irfu, Centre de Saclay, Gif-sur-Yvette, France)
- D. MANDAT(Institute of Physics of the Academy of Sciences of the Czech Republic Prague, Czech Republic)
- D. Nakajima(Max-Planck-Institut für Physik München, Germany)
- E. Giro(INAF - Osservatorio Astronomico di Padova Padova, Italy)
- F. Stinzing(ECAP Universität Erlangen-Nürnberg, Erlangen, Germany)
- For the CTA Consotrium()
- G. Bonnoli(INAF - Osservatorio Astronomico di Brera Merate, Italy)
- G. Pareschi(INAF - Osservatorio Astronomico di Brera Merate, Italy)
- G. Pühlhofer(IAAT Universität Tübingen, Tübingen, Germany)
- G. Rodeghiero(INAF - Osservatorio Astronomico di Padova Padova, Italy)
- G. Rojas(Universidade Federal de So Carlos)
- H. Baba(Ibaraki University Japan)
- H. Katagiri(Ibaraki University Japan)
- J. -F. Glicenstein(CEA Irfu, Centre de Saclay, Gif-sur-Yvette, France)
- J. Bähr(Desy Zeuthen Zeuthen, Germany)
- J. Dipold(Instituto de Fsica de So Carlos Universidade de São Paulo, Brasil)
- J. Michałowski(Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland)
- J. Niemiec(Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland)
- J. Rousselle(University of California Los Angeles California, USA)
- K. Seweryn(Space Research Center - Polish Academy of Science Warsaw, Poland)
- L. Lessio(INAF - Osservatorio Astronomico di Padova Padova, Italy)
- M. Chikawa(ICRR University of Tokyo Japan)
- M. Doro(University of Padova and INFN sezione di Padova Padova, Italy)
- M. Dyrda(Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland)
- M. Hayashida(ICRR University of Tokyo Japan)
- M. Hrabovski(Institute of Physics of the Academy of Sciences of the Czech Republic Prague, Czech Republic)
- M. Kagaya(Ibaraki University Japan)
- M. Mariotti(University of Padova and INFN sezione di Padova Padova, Italy)
- M. Palatka(Institute of Physics of the Academy of Sciences of the Czech Republic Prague, Czech Republic)
- M. Pech(Institute of Physics of the Academy of Sciences of the Czech Republic Prague, Czech Republic)
- M. Rataj(Space Research Center - Polish Academy of Science Warsaw, Poland)
- M. Stodulski(Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland)
- M. Teshima(ICRR University of Tokyo Japan)
- P. -H. Carton(CEA Irfu, Centre de Saclay, Gif-sur-Yvette, France)
- P. Brun(CEA Irfu, Centre de Saclay, Gif-sur-Yvette, France)
- P. Chadwick(University of Durham Durham, Great Britain)
- P. Micolon(CEA Irfu, Centre de Saclay, Gif-sur-Yvette, France)
- P. Schovanek(Institute of Physics of the Academy of Sciences of the Czech Republic Prague, Czech Republic)
- P. Travniczek(Institute of Physics of the Academy of Sciences of the Czech Republic Prague, Czech Republic)
- R. Canestrari(INAF - Osservatorio Astronomico di Brera Merate, Italy)
- R. Sakonaka(Kinki University Japan)
- S. Shu(Kinki University Japan)
- T. Armstrong(University of Durham Durham, Great Britain)
- T. Yoshida(Ibaraki University Japan)
- V. De Souza(Instituto de Fsica de So Carlos Universidade de São Paulo, Brasil)
- V. Vassiliev(University of California Los Angeles California, USA)
- Y. Hanabata(Kinki University Japan)
- Ł. Wiśniewski(Space Research Center - Polish Academy of Science Warsaw, Poland)
- Publication venue
- Publication date
- Field of study
The Cherenkov Telescope Array (CTA) is a planned observatory for very-high
energy gamma-ray astronomy. It will consist of several tens of telescopes of
different sizes, with a total mirror area of up to 10,000 square meters. Most
mirrors of current installations are either polished glass mirrors or
diamond-turned aluminium mirrors, both labour intensive technologies. For CTA,
several new technologies for a fast and cost-efficient production of
light-weight and reliable mirror substrates have been developed and industrial
pre-production has started for most of them. In addition, new or improved
aluminium-based and dielectric surface coatings have been developed to increase
the reflectance over the lifetime of the mirrors compared to those of current
Cherenkov telescope instruments
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 detection of short-term variability of the high-peaked BL Lac object 1ES 0806+524
- 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. Fernández-Barral(IFAE Campus UAB, E-08193 Bellaterra, Spain)
- A. González Mu. noz(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. Readhead(Cahill Center for Astronomy and Astrophysics California Institute of Technology, Pasadena CA, 91125, 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 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)
- D. Gasparrini(33 \,34)
- D. Hadasch(Institute of Space Sciences E-08193 Barcelona, 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 KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, 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 O. na 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. D'Ammando(INAF-IRA Bologna Via Gobetti 101, I-40129, Bologna, Italy)
- 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. 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 KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, Japan)
- H. Takami(Japanese MAGIC Consortium KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, 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(8 \,25)
- 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 KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, 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. Richards(Department of Physics Purdue University, 525 Northwestern Ave, West Lafayette, IN 47907, USA)
- 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. Thaele(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Berger(Department of Physics and Astronomy and the Bartol Research Institute University of Delaware, Newark, DE 19716, USA)
- K. Frantzen(Technische Universität Dortmund D-44221 Dortmund, Germany)
- K. Kodani(Japanese MAGIC Consortium KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, Japan)
- K. Mallot(Deutsches Elektronen-Synchrotron)
- K. Mannheim(Universität Würzburg D-97074 Würzburg, Germany)
- K. Nilsson(20 \,28)
- K. Nishijima(Japanese MAGIC Consortium KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, Japan)
- K. Noda(Max-Planck-Institut für Physik D-80805 München, Germany)
- K. Saito(Japanese MAGIC Consortium KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, 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)
- 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)
- M. Hayashida(Japanese MAGIC Consortium KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, 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. 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. 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 KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, 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. Buson(Università di Padova and INFN I-35131 Padova, Italy)
- 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)
- T. Bretz(Universität Würzburg D-97074 Würzburg, Germany)
- T. Hovatta(Aalto University Metsähovi Radio Observatory Metsähovintie 114, FI-02540 Kylmälä, Finland)
- T. Saito(Japanese MAGIC Consortium KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, 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(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- 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. Max-Moerbeck(National Radio Astronomy Observatory P.O. Box 0, Socorro, NM 87801, USA)
- 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 KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, Japan)
- Y. Konno(Japanese MAGIC Consortium KEK, Department of Physics and Hakubi Center, Kyoto University, Tokai University, The University of Tokushima, ICRR, The University of Tokyo, Japan)
- Publication venue
- Publication date
- Field of study
The high-frequency-peaked BL Lac (HBL) 1ES 0806+524 (z = 0.138) was
discovered in VHE γ rays in 2008. Until now, the broad-band spectrum of
1ES 0806+524 has been only poorly characterized, in particular at high
energies. We analysed multiwavelength observations from γ rays to radio
performed from 2011 January to March, which were triggered by the high activity
detected at optical frequencies. These observations constitute the most precise
determination of the broad-band emission of 1ES 0806+524 to date. The
stereoscopic MAGIC observations yielded a γ-ray signal above 250 GeV of
(3.7±0.7) per cent of the Crab Nebula flux with a statistical
significance of 9.9 σ. The multiwavelength observations showed
significant variability in essentially all energy bands, including a VHE
γ-ray flare that lasted less than one night, which provided
unprecedented evidence for short-term variability in 1ES 0806+524. The spectrum
of this flare is well described by a power law with a photon index of 2.97±0.29 between ∼150 GeV and 1 TeV and an integral flux of (9.3±1.9)
per cent of the Crab Nebula flux above 250 GeV. The spectrum during the
non-flaring VHE activity is compatible with the only available VHE observation
performed in 2008 with VERITAS when the source was in a low optical state. The
broad-band spectral energy distribution can be described with a one-zone
Synchrotron Self Compton model with parameters typical for HBLs, indicating
that 1ES 0806+524 is not substantially different from the HBLs previously
detected
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
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
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
Teraelectronvolt pulsed emission from the Crab pulsar detected by MAGIC
- Author
- A. Babic(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka, University of Split and University of 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. Domínguez(Universidad Complutense E-28040 Madrid, Spain)
- A. Fernández-Barral(Institut de Fisica d'Altes Energies)
- A. González Muñoz(Institut de Fisica d'Altes Energies)
- A. Hahn(Max-Planck-Institut für Physik D-80805 München, Germany)
- A. La Barbera(INAF National Institute for Astrophysics I-00136 Rome, Italy)
- A. Moralejo(Institut de Fisica d'Altes Energies)
- 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 di Udine and INFN Trieste, I-33100 Udine, 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, University of Split and University of 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 for Space Sciences)
- 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. Gora(Deutsches Elektronen-Synchrotron)
- D. Guberman(Institut de Fisica d'Altes Energies)
- D. Hadasch(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. Hrupec(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka, University of Split and University of Zagreb, Croatia)
- D. Lelas(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka, University of Split and University of 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, Universidad de La Laguna, Dpto. Astrofísica, E-38206 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, Universidad de La Laguna, Dpto. Astrofísica, E-38206 La Laguna, Tenerife, Spain)
- E. de Oña Wilhelmi(Institute for Space Sciences)
- 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. Moretti(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. Hughes(ETH Zurich CH-8093 Zurich, Switzerland)
- G. Maneva(Inst. for Nucl. Research and Nucl. Energy BG-1784 Sofia, Bulgaria)
- G. Pedaletti(Deutsches Elektronen-Synchrotron)
- 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, University of Split and University of Zagreb, Croatia)
- I. Snidaric(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka, University of Split and University of 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, Universidad de La Laguna, Dpto. Astrofísica, E-38206 La Laguna, Tenerife, Spain)
- J. Cortina(Institut de Fisica d'Altes Energies)
- J. E. Ward(Institut de Fisica d'Altes Energies)
- J. Herrera(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain, Universidad de La Laguna, Dpto. Astrofísica, E-38206 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(Institut de Fisica d'Altes Energies)
- J. Poutanen(Finnish MAGIC Consortium Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland)
- J. Rico(Institut de Fisica d'Altes Energies)
- 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. 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. H. Wu(Institute for Space Sciences)
- 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, Universidad de La Laguna, Dpto. Astrofísica, E-38206 La Laguna, Tenerife, Spain)
- M. Mariotti(Università di Padova and INFN I-35131 Padova, Italy)
- M. Martínez(Institut de Fisica d'Altes Energies)
- 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, Universidad de La Laguna, Dpto. Astrofísica, E-38206 La Laguna, Tenerife, Spain)
- MAGIC Collaboration
- N. Godinović(Croatian MAGIC Consortium Rudjer Boskovic Institute, University of Rijeka, University of Split and University of Zagreb, Croatia)
- O. Blanch(Institut de Fisica d'Altes Energies)
- 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(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain, Universidad de La Laguna, Dpto. Astrofísica, E-38206 La Laguna, Tenerife, Spain)
- R. J. García López(Inst. de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain, Universidad de La Laguna, Dpto. Astrofísica, E-38206 La Laguna, Tenerife, Spain)
- R. López-Coto(Institut de Fisica d'Altes Energies)
- 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. 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. Buson(Università di Padova and INFN I-35131 Padova, Italy)
- 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)
- 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, University of Split and University of 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. 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
Aims: To investigate the extension of the very-high-energy spectral tail of
the Crab pulsar at energies above 400 GeV. Methods: We analyzed ∼320 hours
of good quality data of Crab with the MAGIC telescope, obtained from February
2007 until April 2014. Results: We report the most energetic pulsed emission
ever detected from the Crab pulsar reaching up to 1.5 TeV. The pulse profile
shows two narrow peaks synchronized with the ones measured in the GeV energy
range. The spectra of the two peaks follow two different power-law functions
from 70 GeV up to 1.5 TeV and connect smoothly with the spectra measured above
10 GeV by the Large Area Telescope (LAT) on board of the Fermi satellite. When
making a joint fit of the LAT and MAGIC data, above 10 GeV, the photon indices
of the spectra differ by 0.5±0.1. Conclusions: We measured with the MAGIC
telescopes the most energetic pulsed photons from a pulsar to date. Such TeV
pulsed photons require a parent population of electrons with a Lorentz factor
of at least 5×106. These results strongly suggest IC scattering off
low energy photons as the emission mechanism and a gamma-ray production region
in the vicinity of the light cylinder
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