INVESTIGADORES
SUPANITSKY Alberto Daniel
artículos
Título:
Measurement of the cosmic ray spectrum above 4x10^18 eV using inclined events detected with the Pierre Auger Observatory
Autor/es:
THE PIERRE AUGER COLLABORATION (A. AAB, ..., A.D. SUPANITSKY, ...)
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:
A measurement of the cosmic-ray spectrum for energies exceeding 4x10^18 eV is presented, which is based on the analysis of showers with zenith angles greater than 60deg 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 5.3x10^18 eV, the ?ankle?, the flux can be described by a power law E^−gamma 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))×10^19 eV.
