INVESTIGADORES
SANCHEZ Federico Andres
artículos
Título:
Measurement of the cosmic ray spectrum above 4 × 1018 eV using inclined events detected with the Pierre Auger Observatory
Autor/es:
AUGER COLLABORATION (VER F. SANCHEZ EN PUBL. ADJUNTA)
Revista:
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2015
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 Decem- ber 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 in- dex 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 (sys))×1019 eV.−1.2
