Measurement of the cosmic ray spectrum above 4 × 10<sup>18</sup> eV using inclined events detected with the Pierre Auger Observatory
Abstract:
A measurement of the cosmic-ray spectrum for energies exceeding 4×1018 eV is presented, which is based on the analysis of showers with zenith angles greater than 60° detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above 5.3×1018 eV, the "ankle", the flux can be described by a power law E-γ with index γ=2.70 ± 0.02 (stat) ± 0.1 (sys) followed by a smooth suppression region. For the energy (Es) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find Es=(5.12 ± 0.25 (stat)+1.0-1.2 (sys))×1019 eV.
Año de publicación:
2015
Keywords:
- ultra high energy cosmic rays
- Cosmic ray experiments
Fuente:
scopus
Tipo de documento:
Article
Estado:
Acceso restringido
Áreas de conocimiento:
- Rayo cósmico
- Ciencia planetaria
Áreas temáticas:
- Física moderna
- Cuerpos y fenómenos celestes específicos
- Astronomía y ciencias afines
Contribuidores:
Albuquerque I.F.M.
Buchholz P.
Abreu P.
Aublin J.
Boncioli D.
Avenier M.
De Oliveira J.
Cocciolo G.
Caruso R.
Neto J.R.T.d.M.
de Jong S.J.
Castellina A.
Daumiller K.
Ave M.
Bäuml J.
Barber K.B.
Dallier R.
Chudoba J.
Becker K.H.
Coutu S.
Blanco M.
Andringa S.
Cronin J.W.
Buscemi M.
Aab A.
Almela A.
Covault C.E.
Cazón L.
Blaess S.G.
Biermann P.L.
Colalillo R.
Allekotte I.
Aglietta M.
De Almeida R.M.
Conceiç˜ao R.
Candusso M.
Cooper M.J.
Mary L. Díaz Castro
Javier Garcia
Chiavassa A.
Billoir P.
Aminaei A.
Coluccia M.R.
Dembinski H.
Bonifazi C.
Allison P.
Bellido J.A.
Brancus I.
Avila G.
Chavez A.G.
Collica L.
Arsene N.
Brown W.C.
del Peral L.
Dasso S.
Anchordoqui L.A.
Chinellato J.A.
Bl̈umer H.
Buitink S.
Caramete L.
Caballero-Mora K.S.
Bertou X.
Borodai N.
Dawson B.R.
Cester R.
Bohã̌cov́a M.
Mitri I.D.
Ambrosio M.
Batista R.A.
Brack J.
Daniel B.
Badescu A.M.
Coleman A.
Contreras F.
Beatty J.J.
Souza V.d.
Assis P.
Clay R.W.
Berat C.
Asorey H.G.
Bridgeman A.
Awal N.
Ahn E.J.
Caccianiga L.
Bueno A.
Caccianiga B.
De Mauro G.
Baus C.
Arqueros F.
Cordier A.
Cilmo M.
Al Samarai I.
Brogueira P.
Alvarez Castillo J.
Bleve C.
Aranda V.M.
Cataldi G.
Bertaina M.E.
Aramo C.
Blanco A.
Deligny O.
Alvarez-Mu˜niz J.