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Arganda, E. and Arqueros Martínez, Fernando and Blanco Ramos, Francisco and García Pinto, Diego and Monasor, M. and Ortiz Ramis, Montserrat and Rosado Vélez, Jaime and Vázquez Peñas, José Ramón (2010) Measurement of the energy spectrum of cosmic rays above 10(18) eV using the Pierre Auger Observatory. Physics letters B, 685 (04-may). pp. 239-246. ISSN 0370-2693
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Official URL: http://dx.doi.org/10.1016/j.physletb.2010.02.013
Abstract
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 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 (C) 2010 Elsevier B V All rights reserved
Item Type: | Article |
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Additional Information: | © 2010 Elsevier B.V. |
Uncontrolled Keywords: | Surface detector; Upper limit; Photon fraction; Simulation; Electrons; Showers; System; Array. |
Subjects: | Sciences > Physics > Nuclear physics |
ID Code: | 39331 |
Deposited On: | 10 Oct 2016 11:46 |
Last Modified: | 10 Dec 2018 14:58 |
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