Measurement of the Anisotropy of Cosmic-ray Arrival Directions with IceCube
We report the first observation of an anisotropy in the arrival direction of cosmic rays with energies in the multi-TeV region in the Southern 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...
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ftunivalabama:oai:ir.ua.edu:123456789/5911 2023-05-15T13:56:41+02:00 Measurement of the Anisotropy of Cosmic-ray Arrival Directions with IceCube Santander, Marcos 2010-07-16 http://ir.ua.edu/handle/123456789/5911 English eng http://ir.ua.edu/handle/123456789/5911 cosmic rays neutrinos text 2010 ftunivalabama 2023-01-07T16:41:25Z We report the first observation of an anisotropy in the arrival direction of cosmic rays with energies in the multi-TeV region in the Southern 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 over 22 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 are suitable 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. Text Antarc* Antarctic University of Alabama Institutional Repository Antarctic The Antarctic |
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Open Polar |
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University of Alabama Institutional Repository |
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ftunivalabama |
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English |
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cosmic rays neutrinos |
spellingShingle |
cosmic rays neutrinos Santander, Marcos Measurement of the Anisotropy of Cosmic-ray Arrival Directions with IceCube |
topic_facet |
cosmic rays neutrinos |
description |
We report the first observation of an anisotropy in the arrival direction of cosmic rays with energies in the multi-TeV region in the Southern 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 over 22 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 are suitable 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. |
format |
Text |
author |
Santander, Marcos |
author_facet |
Santander, Marcos |
author_sort |
Santander, Marcos |
title |
Measurement of the Anisotropy of Cosmic-ray Arrival Directions with IceCube |
title_short |
Measurement of the Anisotropy of Cosmic-ray Arrival Directions with IceCube |
title_full |
Measurement of the Anisotropy of Cosmic-ray Arrival Directions with IceCube |
title_fullStr |
Measurement of the Anisotropy of Cosmic-ray Arrival Directions with IceCube |
title_full_unstemmed |
Measurement of the Anisotropy of Cosmic-ray Arrival Directions with IceCube |
title_sort |
measurement of the anisotropy of cosmic-ray arrival directions with icecube |
publishDate |
2010 |
url |
http://ir.ua.edu/handle/123456789/5911 |
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Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
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Antarc* Antarctic |
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Antarc* Antarctic |
op_relation |
http://ir.ua.edu/handle/123456789/5911 |
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1766264262750109696 |