Title
Measurement of the cosmic ray energy spectrum using hybrid events of the Pierre Auger Observatory
Date Issued
01 August 2012
Access level
open access
Resource Type
journal article
Author(s)
Settimo M.
Abreu P.
Aglietta M.
Ahlers M.
Ahn E.J.
Albuquerque I.F.M.
Allard D.
Allekotte I.
Allen J.
Allison P.
Almela A.
Alvarez Castillo J.
Alvarez-Mu˜niz J.
Alves Batista R.
Ambrosio M.
Aminaei A.
Anchordoqui L.
Andringa S.
Antiči'c T.
Aramo C.
Arqueros F.
Asorey H.
Assis P.
Aublin J.
Ave M.
Avenier M.
Avila G.
Badescu A.M.
Barber K.B.
Barbosa A.F.
Bardenet R.
Baughman B.
Bäuml J.
Baus C.
Beatty J.J.
Becker K.H.
Bellétoile A.
Bellido J.A.
BenZvi S.
Berat C.
Bertou X.
Biermann P.L.
Billoir P.
Blanco F.
Blanco M.
Bleve C.
Blümer H.
Boháčová M.
Boncioli D.
Bonifazi C.
Bonino R.
Borodai N.
Brack J.
Brancus I.
Brogueira P.
Brown W.C.
Bruijn R.
Buchholz P.
Bueno A.
Buroker L.
Burton R.E.
Caballero-Mora K.S.
Caccianiga B.
Caramete L.
Caruso R.
Castellina A.
Cataldi G.
Cazon L.
Cester R.
Chauvin J.
Cheng S.H.
Chiavassa A.
Chinellato J.A.
Chirinos Diaz J.
Chudoba J.
Cilmo M.
Clay R.W.
Cocciolo G.
Collica L.
Coluccia M.R.
Conceiç˜ao R.
Contreras F.
Cook H.
Cooper M.J.
Coppens J.
Cordier A.
Coutu S.
Covault C.E.
Creusot A.
Criss A.
Cronin J.
Curutiu A.
Dallier R.
Daniel B.
Dasso S.
Daumiller K.
Dawson B.R.
de Almeida R.M.
De Domenico M.
Publisher(s)
Springer Verlag
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.
Start page
1
End page
15
Volume
127
Issue
8
Language
English
OCDE Knowledge area
Meteorología y ciencias atmosféricas
Subjects
Scopus EID
2-s2.0-84865792714
Source
European Physical Journal Plus
ISSN of the container
21905444
Sponsor(s)
National Science Foundation (0450696, 1068696, 1212538) and Science and Technology Facilities Council (ST/J000507/1).
Sources of information:
Directorio de Producción Científica
Scopus