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. © 2012 Società Italiana di Fisica and Springer.
Documento: | Artículo |
Título: | Measurement of the cosmic ray energy spectrum using hybrid events of the Pierre Auger Observatory |
Autor: | Multitudinario:515 |
Filiación: | Universität Siegen, Siegen, Germany Dipartimento di Matematica e Fisica Ennio De Giorgi, Università del Salento, Lecce, Italy Observatorio Pierre Auger, Malargüe, Argentina Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina Centro de Investigaciones en Láseres y Aplicaciones, CITEDEF and CONICET, Argentina Departamento de Física, FCEyN, Universidad de Buenos Aires y CONICET, Argentina IFLP, Universidad Nacional de La Plata and CONICET, La Plata, Argentina Instituto de Astronomía y Física del Espacio (CONICET-UBA), Buenos Aires, Argentina Instituto de Física de Rosario (IFIR) - CONICET/U.N.R. and Facultad de Ciencias Bioquímicas y Farmacéuticas U.N.R., Rosario, Argentina Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina National Technological University, Faculty Mendoza (CONICET/CNEA), Mendoza, Argentina Observatorio Pierre Auger, Malargüe, Argentina Observatorio Pierre Auger and Comisión Nacional de Energía Atómica, Malargüe, Argentina Universidad Tecnológica Nacional - Facultad Regional Buenos Aires, Buenos Aires, Argentina University of Adelaide, Adelaide, SA, Australia Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, RJ, Brazil Universidade de S˜ao Paulo, Instituto de Física, S˜ao Carlos, SP, Brazil Universidade de S˜ao Paulo, Instituto de Física, S˜ao Paulo, SP, Brazil Universidade Estadual de Campinas, IFGW, Campinas, SP, Brazil Universidade Estadual de Feira de Santana, Brazil Universidade Federal da Bahia, Salvador, BA, Brazil Universidade Federal do ABC, Santo André, SP, Brazil Universidade Federal do Rio de Janeiro, Instituto de Física, Rio de Janeiro, RJ, Brazil Universidade Federal Fluminense, EEIMVR, Volta Redonda, RJ, Brazil Rudjer Boškovi'c Institute, Zagreb, 10000, Croatia Charles University, Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Prague, Czech Republic Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic Palacky University, RCPTM, Olomouc, Czech Republic Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris 11, CNRS-IN2P3, Orsay, France Laboratoire AstroParticule et Cosmologie (APC), Université Paris 7, CNRS-IN2P3, Paris, France Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, France Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier Grenoble, CNRS-IN2P3, Grenoble INP, France Station de Radioastronomie de Nançay, Observatoire de Paris, CNRS/INSU, France SUBATECH, École des Mines de Nantes, CNRS-IN2P3, Université de Nantes, France Bergische Universität Wuppertal, Wuppertal, Germany Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany Karlsruhe Institute of Technology - Campus North - Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle Kernphysik (IEKP), Karlsruhe, Germany Max-Planck-Institut für Radioastronomie, Bonn, Germany RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany Universität Hamburg, Hamburg, Germany Universität Siegen, Siegen, Germany Dipartimento di Fisica dell'Università and INFN, Genova, Italy Università dell'Aquila and INFN, L'Aquila, Italy Università di Milano and Sezione INFN, Milan, Italy Università di Napoli ”Federico II” and Sezione INFN, Napoli, Italy Università di Roma II ”Tor Vergata” and Sezione INFN, Roma, Italy Università di Catania and Sezione INFN, Catania, Italy Università di Torino and Sezione INFN, Torino, Italy Dipartimento di Matematica e Fisica ”E. De Giorgi” dell'Università del Salento and Sezione INFN, Lecce, Italy Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (INAF), Palermo, Italy Istituto di Fisica dello Spazio Interplanetario (INAF), Università di Torino and Sezione INFN, Torino, Italy INFN, Laboratori Nazionali del Gran Sasso, Assergi (L'Aquila), Italy Benemérita Universidad Autónoma de Puebla, Puebla, Mexico Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV), México, Mexico Universidad Michoacana de San Nicolas de Hidalgo, Morelia, Michoacan, Mexico Universidad Nacional Autonoma de Mexico, Mexico, D.F., Mexico IMAPP, Radboud University Nijmegen, Netherlands Kernfysisch Versneller Instituut, University of Groningen, Groningen, Netherlands Nikhef, Science Park, Amsterdam, Netherlands ASTRON, Dwingeloo, Netherlands Institute of Nuclear Physics PAN, Krakow, Poland University of Łódź, Łódź, Poland LIP and Instituto Superior Técnico, Technical University of Lisbon, Portugal ‘Horia Hulubei’ National Institute for Physics and Nuclear Engineering, Bucharest- Magurele, Romania University of Bucharest, Physics Department, Romania University Politehnica of Bucharest, Romania J. Stefan Institute, Ljubljana, Slovenia Laboratory for Astroparticle Physics, University of Nova Gorica, Slovenia Instituto de Física Corpuscular, CSIC-Universitat de València, Valencia, Spain Universidad Complutense de Madrid, Madrid, Spain Universidad de Alcalá, Alcalá de Henares (Madrid), Spain Universidad de Granada and C.A.F.P.E., Granada, Spain Universidad de Santiago de Compostela, Spain Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford, United Kingdom School of Physics and Astronomy, University of Leeds, United Kingdom Argonne National Laboratory, Argonne, IL, United States Case Western Reserve University, Cleveland, OH, United States Colorado School of Mines, Golden, CO, United States Colorado State University, Fort Collins, CO, United States Colorado State University, Pueblo, CO, United States Fermilab, Batavia, IL, United States Los Alamos National Laboratory, Los Alamos, NM, United States Louisiana State University, Baton Rouge, LA, United States Michigan Technological University, Houghton, MI, United States New York University, New York, NY, United States Northeastern University, Boston, MA, United States Ohio State University, Columbus, OH, United States Pennsylvania State University, University Park, PA, United States University of Chicago, Enrico Fermi Institute, Chicago, IL, United States University of Hawaii, Honolulu, HI, United States University of Nebraska, Lincoln, NE, United States University of New Mexico, Albuquerque, NM, United States University of Wisconsin, Madison, WI, United States University of Wisconsin, Milwaukee, WI, United States Institute for Nuclear Science and Technology (INST), Hanoi, Viet Nam Konan University, Kobe, Japan Universidad Autonoma de Chiapas, Mexico University of Maryland, United States NYU Abu Dhabi, United Arab Emirates Université de Lausanne, Switzerland |
Año: | 2012 |
Volumen: | 127 |
Número: | 8 |
Página de inicio: | 1 |
Página de fin: | 15 |
DOI: | http://dx.doi.org/10.1140/epjp/i2012-12087-9 |
Título revista: | European Physical Journal Plus |
Título revista abreviado: | Eur. Phys. J. Plus |
ISSN: | 21905444 |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21905444_v127_n8_p1_Multitudinario |