INVESTIGADORES
FIGUEIRA Juan Manuel
artículos
Título:
Measurement of the cosmic ray spectrum above 4 × 10 18 eV using inclined events detected with the Pierre Auger Observatory
Autor/es:
THE PIERRE AUGER COLLABORATION; J. M. FIGUEIRA
Revista:
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2015 vol. 08 p. 1 - 22
ISSN:
1475-7516
Resumen:
Journal of Cosmology and Astroparticle Physics 08, 049 (2015) /// 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.
