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

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. © 2012 Società Italiana di Fisica and Springer.

Año de publicación:

2012

Keywords:

    Fuente:

    scopusscopus

    Tipo de documento:

    Article

    Estado:

    Acceso restringido

    Áreas de conocimiento:

    • Física de partículas
    • Ciencia planetaria

    Áreas temáticas:

    • Física moderna
    • Cuerpos y fenómenos celestes específicos
    • Astronomía y ciencias afines

    Contribuidores:

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    Albuquerque I.F.M.Albuquerque I.F.M.
    Bardenet R.Bardenet R.
    Buchholz P.Buchholz P.
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    Aublin J.Aublin J.
    Boncioli D.Boncioli D.
    Avenier M.Avenier M.
    Cocciolo G.Cocciolo G.
    Burton R.E.Burton R.E.
    Aglietta M.Aglietta M.
    Caruso R.Caruso R.
    Castellina A.Castellina A.
    Cheng S.H.Cheng S.H.
    Bonino R.Bonino R.
    Daumiller K.Daumiller K.
    Ave M.Ave M.
    Bäuml J.Bäuml J.
    Barber K.B.Barber K.B.
    Dallier R.Dallier R.
    Chudoba J.Chudoba J.
    Becker K.H.Becker K.H.
    Creusot A.Creusot A.
    Coutu S.Coutu S.
    Blanco M.Blanco M.
    Andringa S.Andringa S.
    Cronin J.W.Cronin J.W.
    Benzvi S.Y.Benzvi S.Y.
    Almela A.Almela A.
    Barbosa A.F.Barbosa A.F.
    Covault C.E.Covault C.E.
    Cazón L.Cazón L.
    Biermann P.L.Biermann P.L.
    Allekotte I.Allekotte I.
    Baughman B.M.Baughman B.M.
    De Almeida R.M.De Almeida R.M.
    Conceiç˜ao R.Conceiç˜ao R.
    Cooper M.J.Cooper M.J.
    Ahlers M.Ahlers M.
    Javier GarciaJavier Garcia
    Chiavassa A.Chiavassa A.
    Billoir P.Billoir P.
    Aminaei A.Aminaei A.
    Coluccia M.R.Coluccia M.R.
    Bonifazi C.Bonifazi C.
    Allison P.Allison P.
    Bruijn R.Bruijn R.
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    Bellido J.A.Bellido J.A.
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    Avila G.Avila G.
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    Brown W.C.Brown W.C.
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    Dasso S.Dasso S.
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    Ambrosio M.Ambrosio M.
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    Beatty J.J.Beatty J.J.
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    Asorey H.G.Asorey H.G.
    Chirinos Diaz J.C.Chirinos Diaz J.C.
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    Ahn E.J.Ahn E.J.
    Buroker L.Buroker L.
    Bueno A.Bueno A.
    Caccianiga B.Caccianiga B.
    Baus C.Baus C.
    Chauvin J.Chauvin J.
    Arqueros F.Arqueros F.
    Cordier A.Cordier A.
    Cilmo M.Cilmo M.
    Coppens J.Coppens J.
    Brogueira P.Brogueira P.
    Alvarez Castillo J.Alvarez Castillo J.
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    Alvarez-Mu˜niz J.Alvarez-Mu˜niz J.
    Antiči'C T.Antiči'C T.