Observation of Cosmic-Ray Anisotropy with the IceTop Air Shower Array
We report on the observation of anisotropy in the arrival direction distribution of cosmic rays at PeV energies. The analysis is based on data taken between 2009 and 2012 with the IceTop air shower array at the south pole. IceTop, an integral part of the IceCube detector, is sensitive to cosmic rays...
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ftunivgeneve:oai:unige.ch:unige:39070 2023-05-15T18:22:33+02:00 Observation of Cosmic-Ray Anisotropy with the IceTop Air Shower Array IceCube Collaboration Aguilar Sanchez, Juan Montaruli, Teresa 2013 https://archive-ouverte.unige.ch/unige:39070 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/765/1/55 unige:39070 https://archive-ouverte.unige.ch/unige:39070 info:eu-repo/semantics/openAccess ISSN: 0004-637X The Astrophysical journal, Vol. 765, No 55 (2013) P. 9 info:eu-repo/classification/ddc/500.2 Astroparticle physics Cosmic rays Text Article scientifique info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2013 ftunivgeneve https://doi.org/10.1088/0004-637X/765/1/55 2022-06-19T23:39:22Z We report on the observation of anisotropy in the arrival direction distribution of cosmic rays at PeV energies. The analysis is based on data taken between 2009 and 2012 with the IceTop air shower array at the south pole. IceTop, an integral part of the IceCube detector, is sensitive to cosmic rays between 100 TeV and 1 EeV. With the current size of the IceTop data set, searches for anisotropy at the 10–3 level can, for the first time, be extended to PeV energies. We divide the data set into two parts with median energies of 400 TeV and 2 PeV, respectively. In the low energy band, we observe a strong deficit with an angular size of about 30° and an amplitude of (– 1.58 ± 0.46stat ± 0.52sys) × 10–3 at a location consistent with previous observations of cosmic rays with the IceCube neutrino detector. The study of the high energy band shows that the anisotropy persists to PeV energies and increases in amplitude to (– 3.11 ± 0.38stat ± 0.96sys) × 10–3. Article in Journal/Newspaper South pole Université de Genève: Archive ouverte UNIGE South Pole The Astrophysical Journal 765 1 55 |
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Université de Genève: Archive ouverte UNIGE |
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ftunivgeneve |
language |
English |
topic |
info:eu-repo/classification/ddc/500.2 Astroparticle physics Cosmic rays |
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info:eu-repo/classification/ddc/500.2 Astroparticle physics Cosmic rays IceCube Collaboration Observation of Cosmic-Ray Anisotropy with the IceTop Air Shower Array |
topic_facet |
info:eu-repo/classification/ddc/500.2 Astroparticle physics Cosmic rays |
description |
We report on the observation of anisotropy in the arrival direction distribution of cosmic rays at PeV energies. The analysis is based on data taken between 2009 and 2012 with the IceTop air shower array at the south pole. IceTop, an integral part of the IceCube detector, is sensitive to cosmic rays between 100 TeV and 1 EeV. With the current size of the IceTop data set, searches for anisotropy at the 10–3 level can, for the first time, be extended to PeV energies. We divide the data set into two parts with median energies of 400 TeV and 2 PeV, respectively. In the low energy band, we observe a strong deficit with an angular size of about 30° and an amplitude of (– 1.58 ± 0.46stat ± 0.52sys) × 10–3 at a location consistent with previous observations of cosmic rays with the IceCube neutrino detector. The study of the high energy band shows that the anisotropy persists to PeV energies and increases in amplitude to (– 3.11 ± 0.38stat ± 0.96sys) × 10–3. |
author2 |
Aguilar Sanchez, Juan Montaruli, Teresa |
format |
Article in Journal/Newspaper |
author |
IceCube Collaboration |
author_facet |
IceCube Collaboration |
author_sort |
IceCube Collaboration |
title |
Observation of Cosmic-Ray Anisotropy with the IceTop Air Shower Array |
title_short |
Observation of Cosmic-Ray Anisotropy with the IceTop Air Shower Array |
title_full |
Observation of Cosmic-Ray Anisotropy with the IceTop Air Shower Array |
title_fullStr |
Observation of Cosmic-Ray Anisotropy with the IceTop Air Shower Array |
title_full_unstemmed |
Observation of Cosmic-Ray Anisotropy with the IceTop Air Shower Array |
title_sort |
observation of cosmic-ray anisotropy with the icetop air shower array |
publishDate |
2013 |
url |
https://archive-ouverte.unige.ch/unige:39070 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
ISSN: 0004-637X The Astrophysical journal, Vol. 765, No 55 (2013) P. 9 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/765/1/55 unige:39070 https://archive-ouverte.unige.ch/unige:39070 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1088/0004-637X/765/1/55 |
container_title |
The Astrophysical Journal |
container_volume |
765 |
container_issue |
1 |
container_start_page |
55 |
_version_ |
1766201969659084800 |