Measurement of the cosmic ray spectrum above 4 × 10 18 eV using inclined events detected with the Pierre Auger Observatory

A measurement of the cosmic-ray spectrum for energies exceeding 4×10 18 eV is presented, which is based on the analysis of showers with zenith angles greater than 60° detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppres...

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Autor principal: Multitudinario:463
Formato: JOUR
Materias:
cosmic ray experiments
ultra high energy cosmic rays
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14757516_v2015_n8_p_Multitudinario
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_14757516_v2015_n8_p_Multitudinario2023-10-03T16:18:48Z Measurement of the cosmic ray spectrum above 4 × 10 18 eV using inclined events detected with the Pierre Auger Observatory Multitudinario:463 cosmic ray experiments ultra high energy cosmic rays A measurement of the cosmic-ray spectrum for energies exceeding 4×10 18 eV is presented, which is based on the analysis of showers with zenith angles greater than 60° detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above 5.3×10 18 eV, the "ankle", the flux can be described by a power law E -γ with index γ=2.70 ± 0.02 (stat) ± 0.1 (sys) followed by a smooth suppression region. For the energy (E s ) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find E s =(5.12 ± 0.25 (stat) +1.0 -1.2 (sys))×10 19 eV. © 2015 IOP Publishing Ltd and Sissa Medialab srl. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14757516_v2015_n8_p_Multitudinario
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic cosmic ray experiments
ultra high energy cosmic rays
spellingShingle cosmic ray experiments
ultra high energy cosmic rays
Multitudinario:463
Measurement of the cosmic ray spectrum above 4 × 10 18 eV using inclined events detected with the Pierre Auger Observatory
topic_facet cosmic ray experiments
ultra high energy cosmic rays
description A measurement of the cosmic-ray spectrum for energies exceeding 4×10 18 eV is presented, which is based on the analysis of showers with zenith angles greater than 60° detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above 5.3×10 18 eV, the "ankle", the flux can be described by a power law E -γ with index γ=2.70 ± 0.02 (stat) ± 0.1 (sys) followed by a smooth suppression region. For the energy (E s ) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find E s =(5.12 ± 0.25 (stat) +1.0 -1.2 (sys))×10 19 eV. © 2015 IOP Publishing Ltd and Sissa Medialab srl.
format JOUR
author Multitudinario:463
author_facet Multitudinario:463
author_sort Multitudinario:463
title Measurement of the cosmic ray spectrum above 4 × 10 18 eV using inclined events detected with the Pierre Auger Observatory
title_short Measurement of the cosmic ray spectrum above 4 × 10 18 eV using inclined events detected with the Pierre Auger Observatory
title_full Measurement of the cosmic ray spectrum above 4 × 10 18 eV using inclined events detected with the Pierre Auger Observatory
title_fullStr Measurement of the cosmic ray spectrum above 4 × 10 18 eV using inclined events detected with the Pierre Auger Observatory
title_full_unstemmed Measurement of the cosmic ray spectrum above 4 × 10 18 eV using inclined events detected with the Pierre Auger Observatory
title_sort measurement of the cosmic ray spectrum above 4 × 10 18 ev using inclined events detected with the pierre auger observatory
url http://hdl.handle.net/20.500.12110/paper_14757516_v2015_n8_p_Multitudinario
work_keys_str_mv AT multitudinario463 measurementofthecosmicrayspectrumabove41018evusinginclinedeventsdetectedwiththepierreaugerobservatory
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