30 research outputs found
The IceCube Neutrino Observatory Part III: Cosmic Rays
Papers on cosmic rays submitted to the 33nd International Cosmic Ray
Conference (Rio de Janeiro 2013) by the IceCube Collaboration
Recommended from our members
The IceCube Neutrino Observatory Part I: Point Source Searches
Papers on point source searches submitted to the 33nd International Cosmic
Ray Conference (Rio de Janeiro 2013) by the IceCube Collaboration
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The IceCube Neutrino Observatory Part II: Atmospheric and Diffuse UHE Neutrino Searches of All Flavors
Papers on atmospheric and diffuse UHE neutrino searches of all flavors
submitted to the 33nd International Cosmic Ray Conference (Rio de Janeiro 2013)
by the IceCube Collaboration
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Observation of the cosmic-ray shadow of the Moon with IceCube
We report on the observation of a significant deficit of cosmic rays from the direction of the Moon with the IceCube detector. The study of this "Moon shadow" is used to characterize the angular resolution and absolute pointing capabilities of the detector. The detection is based on data taken in two periods before the completion of the detector: between April 2008 and May 2009, when IceCube operated in a partial configuration with 40 detector strings deployed in the South Pole ice, and between May 2009 and May 2010 when the detector operated with 59 strings. Using two independent analysis methods, the Moon shadow has been observed to high significance (>6Ï) in both detector configurations. The observed location of the shadow center is within 0.2° of its expected position when geomagnetic deflection effects are taken into account. This measurement validates the directional reconstruction capabilities of IceCube. © 2014 American Physical Society
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The IceCube Neutrino Observatory Part IV: Searches for Dark Matter and Exotic Particles
Papers on searches for Dark Matter and exotic particles submitted to the 33nd
International Cosmic Ray Conference (Rio de Janeiro 2013) by the IceCube
Collaboration
Erratum to: Search for non-relativistic magnetic monopoles with IceCube (The European Physical Journal C, (2014), 74, 7, (2938), 10.1140/epjc/s10052-014-2938-8)
In the analyses, published in Ref. [1], the exclusion limits are calculated in dependence of the mean free path of the magnetic monopole - nucleon catalysis interaction
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The IceCube Neutrino Observatory Part VI: Ice Properties, Reconstruction and Future Developments
Papers on ice properties, reconstruction and future developments submitted to
the 33nd International Cosmic Ray Conference (Rio de Janeiro 2013) by the
IceCube Collaboration
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Search for neutrino-induced particle showers with IceCube-40
We report on the search for neutrino-induced particle showers, so-called cascades, in the IceCube-40 detector. The data for this search were collected between April 2008 and May 2009 when the first 40 IceCube strings were deployed and operational. Three complementary searches were performed, each optimized for different energy regimes. The analysis with the lowest energy threshold (2 TeV) targeted atmospheric neutrinos. A total of 67 events were found, consistent with the expectation of 41 atmospheric muons and 30 atmospheric neutrino events. The two other analyses targeted a harder, astrophysical neutrino flux. The analysis with an intermediate threshold of 25 TeV leads to the observation of 14 cascadelike events, again consistent with the prediction of 3.0 atmospheric neutrino and 7.7 atmospheric muon events. We hence set an upper limit of E2Ίlimâ€7.46Ă10-8GeVsr-1s-1cm-2 (90% C.L.) on the diffuse flux from astrophysical neutrinos of all neutrino flavors, applicable to the energy range 25 TeV to 5 PeV, assuming an EÎœ-2 spectrum and a neutrino flavor ratio of 1 at the Earth. The third analysis utilized a larger and optimized sample of atmospheric muon background simulation, leading to a higher energy threshold of 100 TeV. Three events were found over a background prediction of 0.04 atmospheric muon events and 0.21 events from the flux of conventional and prompt atmospheric neutrinos. Including systematic errors this corresponds to a 2.7Ï excess with respect to the background-only hypothesis. Our observation of neutrino event candidates above 100 TeV complements IceCube's recently observed evidence for high-energy astrophysical neutrinos. © 2014 American Physical Society
Recommended from our members
The IceCube Neutrino Observatory Part III: Cosmic Rays
Papers on cosmic rays submitted to the 33nd International Cosmic Ray
Conference (Rio de Janeiro 2013) by the IceCube Collaboration