Artículos de revistas
Measurement Of The Cosmic Ray Spectrum Above 4 × 1018 Ev Using Inclined Events Detected With The Pierre Auger Observatory
Registro en:
Journal Of Cosmology And Astroparticle Physics. Institute Of Physics Publishing, v. 2015, n. 8, p. , 2015.
14757516
10.1088/1475-7516/2015/08/049
2-s2.0-84941649751
Institución
Resumen
A measurement of the cosmic-ray spectrum for energies exceeding 4×1018 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 5.3×1018 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<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)+1.0<inf>-1.2</inf> (sys))×1019 eV. © 2015 IOP Publishing Ltd and Sissa Medialab srl. 2015 8
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