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Measurement of the energy spectrum of cosmic rays above 10.sup.18./sup. eV using the Pierre Auger Observatory
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SYSNO ASEP 0355276 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Measurement of the energy spectrum of cosmic rays above 1018 eV using the Pierre Auger Observatory Author(s) Abraham, J. (AR)
Abreu, P. (AR)
Aglietta, M. (AR)
Boháčová, Martina (FZU-D) RID, ORCID
Chudoba, Jiří (FZU-D) RID, ORCID
Kárová, Tatiana (FZU-D)
Mandát, Dušan (FZU-D) RID, ORCID
Nečesal, Petr (FZU-D)
Nožka, Libor (FZU-D) RID, ORCID
Nyklíček, Michal (FZU-D)
Palatka, Miroslav (FZU-D) RID, ORCID, SAI
Pech, Miroslav (FZU-D) RID, ORCID
Prouza, Michael (FZU-D) RID, ORCID
Řídký, Jan (FZU-D) RID, ORCID
Schovancová, Jaroslava (FZU-D)
Schovánek, Petr (FZU-D) RID, ORCID
Šmída, Radomír (FZU-D) RID
Trávníček, Petr (FZU-D) RID, ORCIDNumber of authors 18 Source Title Physics Letters. B. - : Elsevier - ISSN 0370-2693
Roč. 685, 4-5 (2010), s. 239-246Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords cosmic rays ; energy spectrum ; Pierre Auger Observatory Subject RIV BF - Elementary Particles and High Energy Physics R&D Projects LC527 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) 1M06002 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) KJB100100904 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) KJB300100801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) LA08016 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10100502 - FZU-D (2005-2011) AV0Z10100522 - FZU-D (2005-2011) UT WOS 000275640600003 DOI 10.1016/j.physletb.2010.02.013 Annotation 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. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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