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https://hdl.handle.net/2440/76750
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Type: | Journal article |
Title: | Measurement of the anisotropy of cosmic-ray arrival directions with IceCube |
Author: | Abbasi, R. Hill, G. |
Citation: | Letters of the Astrophysical Journal, 2010; 718(2):194-198 |
Publisher: | Institute of Physics Publishing. |
Issue Date: | 2010 |
ISSN: | 2041-8205 2041-8213 |
Statement of Responsibility: | R. Abbasi ... G. C. Hill ... et al. (IceCube Collaboration) |
Abstract: | We report the first observation of an anisotropy in the arrival direction of cosmic rays with energies in the multi-TeV region in theSouthern sky using data from the IceCube detector. Between 2007 June and 2008 March, the partially deployed IceCube detector was operated in a configuration with 1320 digital optical sensors distributed over22 strings at depths between 1450 and 2450 m inside the Antarctic ice. IceCube is a neutrino detector, but the data are dominated by a large background of cosmic-ray muons. Therefore, the background data aresuitable for high-statistics studies of cosmic rays in the southern sky. The data include 4.3 billion muons produced by downward-going cosmic-ray interactions in the atmosphere; these events were reconstructed with a median angular resolution of 3° and a median energy of ∼20 TeV. Their arrival direction distribution exhibits an anisotropy in right ascension with a first-harmonic amplitude of (6.4±0.2 stat.±0.8 syst.) × 10-4. © 2010 The American Astronomical Society. |
Keywords: | Cosmic rays-neutrinos |
Rights: | © 2010 The American Astronomical Society. |
DOI: | 10.1088/2041-8205/718/2/L194 |
Published version: | http://dx.doi.org/10.1088/2041-8205/718/2/l194 |
Appears in Collections: | Aurora harvest Chemistry and Physics publications |
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