Measurement of the energy spectrum of cosmic rays above 10 18 eV using the Pierre Auger Observatory

We report a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory. Based on fluorescence observations in coincidence with at least one surface detector we derive a spectrum for energies above 10 18 eV. We also update the previously publ...

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Detalles Bibliográficos
Publicado: 2010
Materias:
Cosmic rays
Energy spectrum
Pierre Auger Observatory
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v685_n4-5_p239_Multitudinario
http://hdl.handle.net/20.500.12110/paper_03702693_v685_n4-5_p239_Multitudinario
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03702693_v685_n4-5_p239_Multitudinario
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spelling paper:paper_03702693_v685_n4-5_p239_Multitudinario2023-06-08T15:36:49Z Measurement of the energy spectrum of cosmic rays above 10 18 eV using the Pierre Auger Observatory Cosmic rays Energy spectrum Pierre Auger Observatory We report a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory. Based on fluorescence observations in coincidence with at least one surface detector we derive a spectrum for energies above 10 18 eV. We also update the previously published energy spectrum obtained with the surface detector array. The two spectra are combined addressing the systematic uncertainties and, in particular, the influence of the energy resolution on the spectral shape. The spectrum can be described by a broken power law E - γ with index γ = 3.3 below the ankle which is measured at log 10 (E ankle / eV) = 18.6. Above the ankle the spectrum is described by a power law with index 2.6 followed by a flux suppression, above about log 10 (E / eV) = 19.5, detected with high statistical significance. © 2010 Elsevier B.V. All rights reserved. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v685_n4-5_p239_Multitudinario http://hdl.handle.net/20.500.12110/paper_03702693_v685_n4-5_p239_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 rays
Energy spectrum
Pierre Auger Observatory
spellingShingle Cosmic rays
Energy spectrum
Pierre Auger Observatory
Measurement of the energy spectrum of cosmic rays above 10 18 eV using the Pierre Auger Observatory
topic_facet Cosmic rays
Energy spectrum
Pierre Auger Observatory
description We report a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory. Based on fluorescence observations in coincidence with at least one surface detector we derive a spectrum for energies above 10 18 eV. We also update the previously published energy spectrum obtained with the surface detector array. The two spectra are combined addressing the systematic uncertainties and, in particular, the influence of the energy resolution on the spectral shape. The spectrum can be described by a broken power law E - γ with index γ = 3.3 below the ankle which is measured at log 10 (E ankle / eV) = 18.6. Above the ankle the spectrum is described by a power law with index 2.6 followed by a flux suppression, above about log 10 (E / eV) = 19.5, detected with high statistical significance. © 2010 Elsevier B.V. All rights reserved.
title Measurement of the energy spectrum of cosmic rays above 10 18 eV using the Pierre Auger Observatory
title_short Measurement of the energy spectrum of cosmic rays above 10 18 eV using the Pierre Auger Observatory
title_full Measurement of the energy spectrum of cosmic rays above 10 18 eV using the Pierre Auger Observatory
title_fullStr Measurement of the energy spectrum of cosmic rays above 10 18 eV using the Pierre Auger Observatory
title_full_unstemmed Measurement of the energy spectrum of cosmic rays above 10 18 eV using the Pierre Auger Observatory
title_sort measurement of the energy spectrum of cosmic rays above 10 18 ev using the pierre auger observatory
publishDate 2010
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v685_n4-5_p239_Multitudinario
http://hdl.handle.net/20.500.12110/paper_03702693_v685_n4-5_p239_Multitudinario
_version_ 1768541563572453376

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