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Measurement of the cosmic ray energy spectrum using hybrid events of the Pierre Auger Observatory

  • Mariangela SettimoEmail author
  • Pierre Auger Collaboration
Regular Article

Abstract

The energy spectrum of ultra-high energy cosmic rays above 1018 eV is measured using the hybrid events collected by the Pierre Auger Observatory between November 2005 and September 2010. The large exposure of the Observatory allows the measurement of the main features of the energy spectrum with high statistics. Full Monte Carlo simulations of the extensive air showers (based on the CORSIKA code) and of the hybrid detector response are adopted here as an independent cross check of the standard analysis (Phys. Lett. B 685, 239 (2010)). The dependence on mass composition and other systematic uncertainties are discussed in detail and, in the full Monte Carlo approach, a region of confidence for flux measurements is defined when all the uncertainties are taken into account. An update is also reported of the energy spectrum obtained by combining the hybrid spectrum and that measured using the surface detector array.

Keywords

Systematic Uncertainty Surface Detector Mass Composition Pierre Auger Observatory Pierre Auger Collaboration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Società Italiana di Fisica and Springer 2012

Authors and Affiliations

  • Mariangela Settimo
    • 1
    • 2
    • 3
    Email author
  • Pierre Auger Collaboration
  1. 1.Universität SiegenSiegenGermany
  2. 2.Dipartimento di Matematica e Fisica “Ennio De Giorgi”Università del SalentoLecceItaly
  3. 3.Observatorio Pierre AugerMalargüeArgentina

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