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Measurement of the cosmic ray spectrum above 4 × 10¹⁸ eV using inclined events detected with the Pierre Auger Observatory

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dc.contributor.authorAab, A.
dc.contributor.authorAbreu, P.
dc.contributor.authorAglietta, M.
dc.contributor.authorAhn, E.
dc.contributor.authorAl Samarai, I.
dc.contributor.authorAlbuquerque, I.
dc.contributor.authorAllekotte, I.
dc.contributor.authorAllison, P.
dc.contributor.authorAlmela, A.
dc.contributor.authorAlvarez Castillo, J.
dc.contributor.authorAlvarez-Muñiz, J.
dc.contributor.authorAlves Batista, R.
dc.contributor.authorAmbrosio, M.
dc.contributor.authorAminaei, A.
dc.contributor.authorAnchordoqui, L.
dc.contributor.authorAndringa, S.
dc.contributor.authorAramo, C.
dc.contributor.authorAranda, V.
dc.contributor.authorArqueros, F.
dc.contributor.authorArsene, N.
dc.contributor.authoret al.
dc.date.issued2015
dc.descriptionThe Pierre Auger collaboration
dc.description.abstractA measurement of the cosmic-ray spectrum for energies exceeding 4×10<sup>18</sup> 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<sup>18</sup> eV, the "ankle", the flux can be described by a power law E<sup>-γ</sup> with index γ=2.70 ± 0.02 (stat) ± 0.1 (sys) followed by a smooth suppression region. For the energy (E<inf>s</inf>) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find E<inf>s</inf>=(5.12 ± 0.25 (stat)<sup>+1.0</sup><inf>-1.2</inf> (sys))×10<sup>19</sup> eV.
dc.description.statementofresponsibilityA. Aab ... Jose A. Bellido Caceres ... Simon G. Blaess ... Roger W. Clay ... Bruce R. Dawson ... Trent D. Grubb ... Thomas A. Harrison ... Gary C. Hill ... Maximus D. Malacari ... Phong H. Nguyen ... Steven J. Saffi ... Fred Sarazin ... Jennifer S. Sorokin ... Patrick Van Bodegom ... Liu Lu ... Yun-Pei Zhu ... et al.
dc.identifier.citationJournal of Cosmology and Astroparticle Physics, 2015; 2015(8):049-1-049-23
dc.identifier.doi10.1088/1475-7516/2015/08/049
dc.identifier.issn1475-7516
dc.identifier.issn1475-7516
dc.identifier.urihttp://hdl.handle.net/2440/101430
dc.language.isoen
dc.publisherIOP Publishing
dc.relation.grantARC
dc.rights© 2015 IOP Publishing Ltd and Sissa Medialab srl.
dc.source.urihttps://doi.org/10.1088/1475-7516/2015/08/049
dc.subjectUltra high energy cosmic rays; cosmic ray experiments
dc.titleMeasurement of the cosmic ray spectrum above 4 × 10¹⁸ eV using inclined events detected with the Pierre Auger Observatory
dc.title.alternativeMeasurement of the cosmic ray spectrum above 4 x 10(18) eV using inclined events detected with the Pierre Auger Observatory
dc.typeJournal article
pubs.publication-statusPublished

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