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Título

Measurement of the energy spectrum of cosmic rays above 10(18) eV using the Pierre Auger Observatory

AutorPIERRE AUGER Collaboration; Pastor, Sergio ; Abraham, J.; Abreu, P.
Palabras clavePierre Auger Observatory
Cosmic rays
Energy spectrum
Fecha de publicación8-mar-2010
EditorElsevier
CitaciónPhysics Letters - Section B 685 (4-5): 239-246 (2010)
ResumenWe 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 10(18) 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-gamma with index gamma = 3 3 below the ankle which is measured at log(10)(E-ankle/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 log(10)(E/eV) = 19 5, detected with high statistical significance.
Versión del editorhttp://dx.doi.org/ 10.1016/j.physletb.2010.02.013
URIhttp://hdl.handle.net/10261/24869
DOI10.1016/j.physletb.2010.02.013
ISSN0370-2693
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