IFIR 05409
INSTITUTO DE FISICA DE ROSARIO
Unidad Ejecutora - UE
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 AUGER COLLABORATION (... M. I. MICHELETTI ...) (THE LIST IS IN ALPHABETIC ORDER)
Revista:
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2015 p. 1 - 22
ISSN:
1475-7516
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 (Es) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find Es = (5.12 ± 0.25 (stat)+1.0 −1.2 (sys))×1019 eV.
