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

被引:36
作者
Settimo, Mariangela [1 ,2 ]
Abreu, P. [18 ,19 ]
Aglietta, M. [14 ,15 ]
Ahlers, M. [24 ]
Ahn, E.J. [21 ]
Albuquerque, IFM [7 ]
Allard, D. [11 ]
Allekotte, I. [4 ]
Allen, J. [22 ]
Allison, P. [23 ]
Almela, A. [5 ,6 ]
Alvarez Castillo, J. [16 ]
Alvarez-Muiz, J. [20 ]
Alves Batista, R. [8 ]
Ambrosio, M. [12 ,13 ]
Aminaei, A [17 ]
Anchordoqui, L. [24 ]
Andring, S. [18 ,19 ]
Anticic, T. [9 ]
Aramo, C. [12 ,13 ]
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.
Bauml, J.
Baus, C.
Beatty, J.J.
Becker, K.H.
Belletoile, A.
Bellido, J.A.
BenZvi, S.
Berat, C.
Bertou, X.
Biermann, P.L.
Billoir, P.
Blanco, F.
Blanco, M.
Bleve, C.
Blumer, H.
Bohacova, M.
Boncioli, D.
Bonifazi, C.
机构
[1] Univ Siegen, Siegen, Germany
[2] Univ Salento, Dipartimento Matemat & Fis Ennio De Giorgi, Lecce, Italy
[3] Observ Pierre Auger, Malargue, Argentina
[4] Ctr Atom Bariloche, San Carlos de Bariloche, Argentina
[5] UNSAM, CONICET, CNEA, Inst Tecnol Detecc & Astroparticules, Buenos Aires, DF, Argentina
[6] Univ Tecnol Nacl, Fac Reg Buenos Aires, Buenos Aires, DF, Argentina
[7] Univ Sao Paulo, Inst Fis, Sao Carlos, SP, Brazil
[8] Univ Estadual, IFGW, Campinas, SP, Brazil
[9] Rudjer Boskovis Inst, Zagreb 10000, Croatia
[10] Univ Paris 11, Inst Phys Nucl Orsay IPNO, CNRS IN2P3, Orsay, France
[11] Univ Paris 07, Lab AstroParticlue & Cosmol, CNRS IN2P3, Orsay, France
[12] Univ Napoli Federico II, Naples, Italy
[13] Sezione Ist Nazl Fis Nucl, Naples, Italy
[14] Univ Turin, Ist Fis Spazio Interplanetario INAF, Turin, Italy
[15] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Assergi, Lquila, Italy
[16] Univ Nacl Autonoma Mexico, Mexico City, DF, Mexico
[17] Radboud Univ Nijmegen, IMAPP, Nijmegen, Netherlands
[18] Univ Tecn Lisboa, LIP, Lisbon, Portugal
[19] Univ Tecn Lisboa, Inst Super Tecn, Lisbon, Portugal
[20] Univ Santiago de Compostela, Santiago De Compostela, Spain
[21] Fermilab Natl Accelerator Lab, Batavia, IL USA
[22] NYU, New York, NY USA
[23] Ohio State Univ, Columbus, OH USA
[24] Univ Wisconsin, Milwaukee, WI USA
来源
EUROPEAN PHYSICAL JOURNAL PLUS | 2012年 / 127卷 / 08期
基金
澳大利亚研究理事会; 美国国家科学基金会; 英国科学技术设施理事会; 巴西圣保罗研究基金会;
关键词
FLUORESCENCE; SIMULATION; PROFILES; SHOWERS;
D O I
10.1140/epjp/i2012-12087-9
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The energy spectrum of ultra-high energy cosmic rays above 10(18)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.
引用
收藏
页码:1 / 15
页数:15
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