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LARGE SCALE DISTRIBUTION OF ULTRA HIGH ENERGY COSMIC RAYS DETECTED AT THE PIERRE AUGER OBSERVATORY WITH ZENITH ANGLES UP TO 80 degrees

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Aab, A. [1] ; Abreu, P. [2, 3] ; Aglietta, M. [4, 5] ; Ahn, E. J. [6] ; Al Samarai, I. [7] ; Albuquerque, I. F. M. [8] ; Allekotte, I. [9, 10] ; Allen, J. [11] ; Allison, P. [12] ; Almela, A. [13, 14] ; Alvarez Castillo, J. [15] ; Alvarez-Muniz, J. [16] ; Batista, R. Alves [17] ; Ambrosio, M. [18, 19] ; Aminaei, A. [20] ; Anchordoqui, L. [21] ; Andringa, S. [2, 3] ; Aramo, C. [18, 19] ; Aranda, M. [22] ; Arqueros, F. [22] ; Asorey, H. [9, 10] ; Assis, P. [2, 3] ; Aublin, J. [23, 24] ; Ave, M. [9, 10] ; Avenier, M. [25] ; Avila, G. [26, 27] ; Awal, N. [11] ; Badescu, A. M. [28] ; Barber, K. B. [29] ; Baeuml, J. [30] ; Baus, C. [30] ; Beatty, J. J. [12] ; Becker, K. H. [31] ; Bellido, J. A. [29] ; Berat, C. [25] ; Bertaina, M. E. [4, 5] ; Bertou, X. [9, 10] ; Biermann, P. L. [32] ; Billoir, P. [23, 24] ; Blaess, S. G. [29] ; Blanco, M. [23, 24] ; Bleve, C. [33, 34] ; Bluemer, H. [30, 35] ; Bohacova, M. [36] ; Boncioli, D. [37] ; Bonifazi, C. [38] ; Bonino, R. [4, 5] ; Borodai, N. 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[36, 86] ; Huber, D. [30] ; Huege, T. [35] ; Insolia, A. [50, 51] ; Isar, P. G. [87] ; Jandt, I. [31] ; Jansen, S. [20, 65] ; Jarne, C. [72, 73] ; Josebachuili, M. [13] ; Kaeaepae, A. [31] ; Kambeitz, O. [30] ; Kampert, K. H. [31] ; Kasper, P. [6] ; Katkov, I. [30] ; Kegl, B. [56] ; Keilhauer, B. [35] ; Keivani, A. [55] ; Kemp, E. [54] ; Kieckhafer, R. M. [68] ; Klages, H. O. [35] ; Kleifges, M. [83] ; Kleinfeller, J. [26] ; Krause, R. [74] ; Krohm, N. [31] ; Kroemer, O. [83] ; Kruppke-Hansen, D. [31] ; Kuempel, D. [74] ; Kunka, N. [83] ; LaHurd, D. [57] ; Latronico, L. [4, 5] ; Lauer, R. [88] ; Lauscher, M. [74] ; Lautridou, P. [59] ; Le Coz, S. [25] ; Leao, M. S. A. B. [89] ; Lebrun, D. [25] ; Lebrun, P. [6] ; Leigui de Oliveira, M. A. [90] ; Letessier-Selvon, A. [23, 24] ; Lhenry-Yvon, I. [7] ; Link, K. [30] ; Lopez, R. [91] ; Louedec, K. [25] ; Lozano Bahilo, J. [43, 44] ; Lu, L. [31, 92] ; Lucero, A. [13] ; Ludwig, M. [30] ; Malacari, M. [29] ; Maldera, S. [4, 5] ; Mallamaci, M. [46, 47] ; Maller, J. [59] ; Mandat, D. [36] ; Mantsch, P. [6] ; Mariazzi, A. G. [72, 73] ; Marin, V. [59] ; Maris, I. C. [43, 44] ; Marsella, G. [33, 34] ; Martello, D. [33, 34] ; Martin, L. [59, 60] ; Martinez, H. [45] ; Martinez Bravo, O. [91] ; Martraire, D. [7] ; Masias Meza, J. J. [61, 62] ; Mathes, H. J. [35] ; Mathys, S. [31] ; Matthews, J. [93] ; Matthews, J. A. J. [88] ; Matthiae, G. [48, 49] ; Maurel, D. [30] ; Maurizio, D. [94] ; Mayotte, E. [95] ; Mazur, P. O. [6] ; Medina, C. [95] ; Medina-Tanco, G. [15] ; Meissner, R. [74] ; Melissas, M. [30] ; Melo, D. [13] ; Menshikov, A. [83] ; Messina, S. [71] ; Meyhandan, R. [78] ; Micanovic, S. [96] ; Micheletti, M. I. [79, 80] ; Middendorf, L. [74] ; Minaya, I. A. [22] ; Miramonti, L. [46, 47] ; Mitrica, B. [41] ; Molina-Bueno, L. [43, 44] ; Mollerach, S. [10] ; Monasor, M. [58] ; Ragaigne, D. Monnier [56] ; Montanet, F. [25] ; Morello, C. [4, 5] ; Mostafa, M. [55] ; Moura, C. A. [90] ; Muller, M. A. [35, 54, 97, 74] ; Mueller, G. ; Mueller, S. ; Muenchmeyer, M. [23, 24] ; Mussa, R. [52, 4] ; Navarra, G. [4, 5] ; Navas, S. [43, 44] ; Necesal, P. [36] ; Nellen, L. [15] ; Nelles, A. [20, 65] ; Neuser, J. [31] ; Nguyen, P. H. [29] ; Niechciol, M. [1] ; Niemietz, L. [31] ; Niggemann, T. [74] ; Nitz, D. [68] ; Nosek, D. [98] ; Novotny, V. [98] ; Nozka, L. [86] ; Ochilo, L. [1] ; Oikonomou, F. [55] ; Olinto, A. [58] ; Oliveira, M. [2, 3] ; Pacheco, N. [67] ; Pakk Selmi-Dei, D. [54] ; Palatka, M. [36] ; Pallotta, J. [62, 99] ; Palmieri, N. [30] ; Papenbreer, P. [31] ; Parente, G. [16] ; Parra, A. [91] ; Paul, T. [100, 21] ; Pech, M. [36] ; Pekala, J. [39] ; Pelayo, R. [91] ; Pepe, I. M. [101] ; Perrone, L. [33, 34] ; Petermann, E. [102] ; Peters, C. [74] ; Petrera, S. [69, 70, 103] ; Petrov, Y. [40] ; Phuntsok, J. [55] ; Piegaia, R. [61, 62] ; Pierog, T. [35] ; Pieroni, P. [61, 62] ; Pimenta, M. [2, 3] ; Pirronello, V. [50, 51] ; Platino, M. [13] ; Plum, M. [74] ; Porcelli, A. [35] ; Porowski, C. [39] ; Prado, R. R. [66] ; Privitera, P. [58] ; Prouza, M. [36] ; Purrello, V. [9, 10] ; Quel, E. J. [62, 99] ; Querchfeld, S. [31] ; Quinn, S. [57] ; Rautenberg, J. [31] ; Ravel, O. [59] ; Ravignani, D. [13] ; Revenu, B. [59] ; Ridky, J. [36] ; Riggi, S. [50, 51] ; Risse, M. [1] ; Ristori, P. [62, 99] ; Rizi, V. [69, 70] ; Rodrigues de Carvalho, W. [16] ; Fernandez, G. Rodriguez [48, 49] ; Rodriguez Rojo, J. [26] ; Rodriguez-Frias, M. D. [67] ; Rogozin, D. [35] ; Ros, G. [67] ; Rosado, J. [22] ; Rossler, T. [86] ; Roth, M. [35] ; Roulet, E. [9, 10] ; Rovero, A. C. [63] ; Saffi, S. J. [29] ; Saftoiu, A. [41] ; Salamida, F. [7] ; Salazar, H. [91] ; Saleh, A. [77] ; Greus, F. Salesa [55] ; Salina, G. [48, 49] ; Sanchez, F. [13] ; Sanchez-Lucas, P. [43, 44] ; Santo, C. E. [2, 3] ; Santos, E. [54] ; Santos, E. M. [8] ; Sarazin, F. [95] ; Sarkar, B. [31] ; Sarmento, R. [2, 3] ; Sato, R. [26] ; Scharf, N. [74] ; Scherini, V. [33, 34] ; Schieler, H. [35] ; Schiffer, P. [17] ; Schmidt, D. [35] ; Scholten, O. [71, 104] ; Schoorlemmer, H. [20, 65, 78] ; Schovanek, P. [36] ; Schroeder, F. G. ; Schulz, A. [35] ; Schulz, J. [20] ; Schumacher, J. [74] ; Sciutto, S. J. [72, 73] ; Segreto, A. [105] ; Settimo, M. [23, 24] ; Shadkam, A. [93] ; Shellard, R. C. [94] ; Sidelnik, I. [9, 10] ; Sigl, G. [17] ; Sima, O. [106] ; Smialkowski, A. [84] ; Smida, R. [35] ; Snow, G. R. [102] ; Sommers, P. [55] ; Sorokin, J. [29] ; Squartini, R. [26] ; Srivastava, Y. N. [100] ; Stanic, S. [77] ; Stapleton, J. [12] ; Stasielak, J. [39] ; Stephan, M. [74] ; Stutz, A. [25] ; Suarez, F. [13] ; Suomijaervi, T. [7] ; Supanitsky, A. D. [63] ; Sutherland, M. S. [12] ; Swain, J. [100] ; Szadkowski, Z. [84] ; Szuba, M. [35] ; Taborda, O. A. [9, 10] ; Tapia, A. [13] ; Tepe, A. [1] ; Theodoro, V. M. [54] ; Timmermans, C. [20, 65] ; Todero Peixoto, C. J. [107] ; Toma, G. [41] ; Tomankova, L. [35] ; Tome, B. [2, 3] ; Tonachini, A. [52, 4] ; Torralba Elipe, G. [16] ; Torres Machado, D. [38] ; Travnicek, P. [36] ; Trovato, E. [50, 51] ; Ulrich, R. [35] ; Unger, M. [35, 11] ; Urban, M. [74] ; Valdes Galicia, J. F. [15] ; Valino, I. [16] ; Valore, L. [18, 19] ; van Aar, G. [20] ; van Bodegom, P. [29] ; van den Berg, A. M. [71] ; van Velzen, S. [20] ; van Vliet, A. [17] ; Varela, E. [91] ; Vargas Cardenas, B. [15] ; Varner, G. [78] ; Vazquez, J. R. [22] ; Vazquez, R. A. [16] ; Veberic, D. [56] ; Verzi, V. [48, 49] ; Vicha, J. [36] ; Videla, M. [13] ; Villasenor, L. [53] ; Vlcek, B. [67] ; Vorobiov, S. [77] ; Wahlberg, H. [72, 73] ; Wainberg, O. [13, 14] ; Walz, D. [74] ; Watson, A. A. [92] ; Weber, M. [83] ; Weidenhaupt, K. [74] ; Weindl, A. [35] ; Werner, F. [30] ; Widom, A. [100] ; Wiencke, L. [95] ; Wilczynska, B. [39] ; Wilczynski, H. [39] ; Williams, C. [58] ; Winchen, T. [31] ; Wittkowski, D. [31] ; Wundheiler, B. [13] ; Wykes, S. [20] ; Yamamoto, T. [58] ; Yapici, T. [68] ; Yuan, G. [93] ; Yushkov, A. [1] ; Zamorano, B. [43, 44] ; Zas, E. [16] ; Zavrtanik, D. [76, 77] ; Zavrtanik, M. [76, 77] ; Zepeda, A. [45, 108] ; Zhou, J. [58] ; Zhu, Y. [83] ; Zimbres Silva, M. [54] ; Ziolkowski, M. [1] ; Zuccarello, F. [50, 51] ; Collaboration, Pierre Auger
Total Authors: 482
Affiliation:
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[1] Univ Siegen, D-57068 Siegen - Germany
[2] Univ Lisbon, Lab Instrumentacao & Fis Expt Particulas LIP, P-1699 Lisbon - Portugal
[3] Univ Lisbon, Inst Super Tecn, P-1699 Lisbon - Portugal
[4] Sezione Ist Nazl Fis Nucl, Turin - Italy
[5] Univ Turin, INAF, Osservatorio Astrofis Torino, Turin - Italy
[6] Fermilab Natl Accelerator Lab, Batavia, IL - USA
[7] Univ Paris 11, CNRS, IN2P3, Inst Phys Nucl Orsay, Paris - France
[8] Univ Sao Paulo, Inst Fis, BR-01498 Sao Paulo, SP - Brazil
[9] CNEA UNCuyo CONICET, Ctr Atom Bariloche, San Carlos De Bariloche, Rio Negro - Argentina
[10] CNEA UNCuyo CONICET, Inst Balseiro, San Carlos De Bariloche, Rio Negro - Argentina
[11] NYU, New York, NY - USA
[12] Ohio State Univ, Columbus, OH 43210 - USA
[13] UNSAM, CONICET, CNEA, Inst Tecnol Detecc & Astroparticulas, Buenos Aires, DF - Argentina
[14] Univ Tecnol Nacl, Fac Reg Buenos Aires, Buenos Aires, DF - Argentina
[15] Univ Nacl Autonoma Mexico, Mexico City 04510, DF - Mexico
[16] Univ Santiago de Compostela, Santiago De Compostela - Spain
[17] Univ Hamburg, Hamburg - Germany
[18] Univ Naples Federico II, Naples - Italy
[19] Sezione Ist Nazl Fis Nucl, Naples - Italy
[20] Radboud Univ Nijmegen, IMAPP, NL-6525 ED Nijmegen - Netherlands
[21] CUNY, Lehman Coll, Dept Phys & Astron, New York, NY 10021 - USA
[22] Univ Complutense Madrid, Madrid - Spain
[23] Univ Paris 07, CNRS, IN2P3, Paris - France
[24] Univ Paris 06, Lab Phys Nucl & Hautes Energies, Paris - France
[25] Univ Grenoble Alpes, CNRS, IN2P3, Lab Phys Subat & Cosmol, Grenoble - France
[26] Observ Pierre Auger, Malargue - Argentina
[27] Comis Nacl Energia Atom, Malargue - Argentina
[28] Univ Politehn Bucuresti, Bucharest - Romania
[29] Univ Adelaide, Adelaide, SA - Australia
[30] Karlsruhe Inst Technol, Inst Expt Kernphys IEKP, D-76021 Karlsruhe - Germany
[31] Berg Univ Wuppertal, Wuppertal - Germany
[32] Max Planck Inst Radioastron, D-53121 Bonn - Germany
[33] Univ Salento, Dipartimento Matemat & Fis E De Giorgi, Lecce - Italy
[34] Sezione Ist Nazl Fis Nucl, Lecce - Italy
[35] Karlsruhe Inst Technol, Inst Kernphys, D-76021 Karlsruhe - Germany
[36] Acad Sci Czech Republic, Inst Phys, Prague - Czech Republic
[37] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Laquila - Italy
[38] Univ Fed Rio de Janeiro, Inst Fis, Rio De Janeiro, RJ - Brazil
[39] PAN, Inst Nucl Phys, Krakow - Poland
[40] Colorado State Univ, Ft Collins, CO 80523 - USA
[41] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest 077125 - Romania
[42] Colorado State Univ, Pueblo, CO - USA
[43] Univ Granada, Granada - Spain
[44] CAFPE, Granada - Spain
[45] CINVESTAV, IPN, Ctr Invest & Estudios Avanzados, Mexico City 14000, DF - Mexico
[46] Univ Milan, Milan - Italy
[47] Sezione Ist Nazl Fis Nucl, Milan - Italy
[48] Univ Roma Tor Vergata, I-00173 Rome - Italy
[49] Sezione Ist Nazl Fis Nucl, Rome - Italy
[50] Univ Catania, Catania - Italy
[51] Sezione Ist Nazl Fis Nucl, Catania - Italy
[52] Univ Turin, Turin - Italy
[53] Univ Michoacana, Morelia, Michoacan - Mexico
[54] Univ Estadual Campinas, IFGW, Campinas, SP - Brazil
[55] Penn State Univ, University Pk, PA 16802 - USA
[56] Univ Paris 11, CNRS, IN2P3, Lab Accelerateur Lineaire, Paris - France
[57] Case Western Reserve Univ, Cleveland, OH 44106 - USA
[58] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 - USA
[59] Univ Nantes, CNRS, IN2P3, Ecole Mines Nantes, SUBATECH, F-44035 Nantes - France
[60] Observ Paris, CNRS, INSU, Stn Radioastron Nancay, Paris - France
[61] Univ Buenos Aires, FCEyN, Dept Fis, RA-1053 Buenos Aires, DF - Argentina
[62] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF - Argentina
[63] CONICET UBA, IAFE, Inst Astron & Fis Espacio, Buenos Aires, DF - Argentina
[64] Univ Fed Fluminense, EEIMVR, Volta Redonda, RJ - Brazil
[65] Nikhef, Amsterdam - Netherlands
[66] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil
[67] Univ Alcala De Henares, Madrid - Spain
[68] Michigan Technol Univ, Houghton, MI 49931 - USA
[69] Univ Aquila, Dipartimento Sci Fis & Chim, I-67100 Laquila - Italy
[70] Ist Nazl Fis Nucl, Milan - Italy
[71] Univ Groningen, Adv Radiat Technol Ctr, KVI, NL-9700 AB Groningen - Netherlands
[72] Consejo Nacl Invest Cient & Tecn, La Plata, Buenos Aires - Argentina
[73] Univ Nacl La Plata, IFLP, RA-1900 La Plata, Buenos Aires - Argentina
[74] Rhein Westfal TH Aachen, Phys Inst 3A, Aachen - Germany
[75] ASTRON, Dwingeloo - Netherlands
[76] Jozef Stefan Inst, Expt Particle Phys Dept, Ljubljana - Slovenia
[77] Univ Nova Gorica, Lab Astroparticle Phys, Nova Gorcia - Slovenia
[78] Univ Hawaii, Honolulu, HI 96822 - USA
[79] UNR, Fac Ciencias Bioquim & Farmaceut, Rosario, Santa Fe - Argentina
[80] CONICET UNR, Inst Fis Rosario IFIR, Rosario, Santa Fe - Argentina
[81] UNSAM, CONICET, CNEA, Inst Tecnol Detecc & Astroparticulas, Mendoza - Argentina
[82] Univ Tecnol Nacl, CONICET, CNEA, Fac Reg Mendoza, Mendoza - Argentina
[83] Karlsruhe Inst Technol, Inst Prozessdatenverarbeitung & Elekt, D-76021 Karlsruhe - Germany
[84] Univ Lodz, PL-90131 Lodz - Poland
[85] Univ Estadual Feira de Santana, Feira De Santana - Brazil
[86] Palacky Univ, RCPTM, CR-77147 Olomouc - Czech Republic
[87] Inst Space Sci, Bucharest - Romania
[88] Univ New Mexico, Albuquerque, NM 87131 - USA
[89] Fac Independente Nordeste, Vitoria Da Conquista - Brazil
[90] Univ Fed ABC, Santo Andre, SP - Brazil
[91] Benemerita Univ Autonoma Puebla, Puebla - Mexico
[92] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire - England
[93] Louisiana State Univ, Baton Rouge, LA 70803 - USA
[94] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ - Brazil
[95] Colorado Sch Mines, Golden, CO 80401 - USA
[96] Rudjer Boskovic Inst, Zagreb 10000 - Croatia
[97] Univ Fed Pelotas, Pelotas, RS - Brazil
[98] Charles Univ Prague, Fac Math & Phys, Inst Nucl & Particle Phys, Prague - Czech Republic
[99] CITEDEF, Ctr Invest Laseres & Aplicac, Buenos Aires, DF - Argentina
[100] Northeastern Univ, Boston, MA 02115 - USA
[101] Univ Fed Bahia, Salvador, BA - Brazil
[102] Univ Nebraska, Lincoln, NE - USA
[103] Ist Nazl Fis Nucl, Gran Sasso Sci Inst, Laquila - Italy
[104] Vrije Univ Brussels, Brussels - Belgium
[105] INAF, Ist Astrofis Spaziale & Fis Cosm Palermo, Palermo - Italy
[106] Univ Bucharest, Dept Phys, Bucharest - Romania
[107] Univ Sao Paulo, Escola Engn Lorena, Lorena, SP - Brazil
[108] Univ Autonoma Chiapas, Chiapas - Mexico
Total Affiliations: 108
Document type: Journal article
Source: ASTROPHYSICAL JOURNAL; v. 802, n. 2 APR 1 2015.
Web of Science Citations: 35
Abstract

We present the results of an analysis of the large angular scale distribution of the arrival directions of cosmic rays with energy above 4 EeV detected at the Pierre Auger Observatory including for the first time events with zenith angle between 60 degrees and 80 degrees. We perform two Rayleigh analyses, one in the right ascension and one in the azimuth angle distributions, that are sensitive to modulations in right ascension and declination, respectively. The largest departure from isotropy appears in the E > 8 EeV energy bin, with an amplitude for the first harmonic in right ascension r(1)(alpha) = (4.4 +/- 1.0) x 10(-2), that has a chance probability P(>= r(1)(alpha)) = 6.4 x 10(-5), reinforcing the hint previously reported with vertical events alone. (AU)

FAPESP's process: 12/51015-5 - Ultra-high energy cosmic rays and the Pierre Auger Observatory
Grantee:Carola Dobrigkeit Chinellato
Support Opportunities: Regular Research Grants
FAPESP's process: 99/05404-3 - Pierre Auger Observatory
Grantee:Carlos Ourivio Escobar
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 10/07359-6 - Study of cosmic rays of highest energies with the Pierre Auger Observatory
Grantee:Carola Dobrigkeit Chinellato
Support Opportunities: Research Projects - Thematic Grants