INVESTIGADORES
GOMEZ ALBARRACIN Flavia Alejandra
artículos
Título:
Measurement of the energy spectrum of cosmic rays above 1018 eV using the Pierre Auger Observatory,"
Autor/es:
PIERRE AUGER COLLABORATION; FLAVIA A. GOMEZ ALBARRACIN
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2010 vol. 685 p. 239 - 246
ISSN:
0370-2693
Resumen:
We report a measurement of the flux of cosmic rays with unprecedented
precision and statistics using the Pierre Auger Observatory. Based on
fluorescence observations in coincidence with at least one surface
detector we derive a spectrum for energies above 1018 eV. We
also update the previously published energy spectrum obtained with the
surface detector array. The two spectra are combined addressing the
systematic uncertainties and, in particular, the influence of the energy
resolution on the spectral shape. The spectrum can be described by a
broken power law E−γ with index γ=3.3 below the ankle which is measured at log10(Eankle/eV)=18.6. Above the ankle the spectrum is described by a power law with index 2.6 followed by a flux suppression, above about log10(E/eV)=19.5, detected with high statistical significance.