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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Main Author: Santander, Marcos
Format: Text
Language:English
Published: 2010
Subjects:
Online Access:http://ir.ua.edu/handle/123456789/5911
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spelling 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
institution Open Polar
collection University of Alabama Institutional Repository
op_collection_id ftunivalabama
language English
topic 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
geographic Antarctic
The Antarctic
geographic_facet Antarctic
The Antarctic
genre Antarc*
Antarctic
genre_facet Antarc*
Antarctic
op_relation http://ir.ua.edu/handle/123456789/5911
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