[1] LIP, P-1000 Lisbon, Portugal
[2] Inst Super Tecn, Lisbon, Portugal
[3] CNEA UNCuyo CONICET, Ctr Atom Bariloche, San Carlos De Bariloche, Rio Negro, Argentina
[4] CNEA UNCuyo CONICET, Inst Balseiro, San Carlos De Bariloche, Rio Negro, Argentina
[5] Comis Nacl Energia Atom CONICET UTN FRBA, Buenos Aires, DF, Argentina
[6] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina
[7] Univ Buenos Aires, FCEyN, Dept Fis, RA-1053 Buenos Aires, DF, Argentina
[8] Consejo Nacl Invest Cient & Tecn, La Plata, Argentina
[9] Univ Nacl La Plata, IFLP, La Plata, Argentina
[10] CONICET UBA, Inst Astronom & Fis Espacio, Buenos Aires, DF, Argentina
[11] Pierre Auger So Observ, Malargue, Argentina
[12] Comis Nacl Energia Atom, Malargue, Argentina
[13] Univ Adelaide, Adelaide, SA, Australia
[14] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[15] Pontificia Univ Catolica Rio de Janeiro, Rio De Janeiro, Brazil
[16] Univ Sao Paulo, Inst Fis, Sao Carlos, SP, Brazil
[17] Univ Sao Paulo, Inst Fis, BR-01498 Sao Paulo, Brazil
[18] Univ Estadual Campinas, IFGW, Campinas, SP, Brazil
[19] Univ Estadual Feira de Santana, Feira De Santana, Brazil
[20] Univ Estadual Sudoeste da Bahia, Vitoria Da Conquista, BA, Brazil
[21] Univ Fed Bahia, Salvador, BA, Brazil
[22] Univ Fed ABC, Santo Andre, SP, Brazil
[23] Univ Fed Rio de Janeiro, Inst Fis, Rio De Janeiro, Brazil
[24] Rudjer Boskovic Inst, Zagreb 10000, Croatia
[25] Charles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, Prague, Czech Republic
[26] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic
[27] Palacky Univ, CR-77147 Olomouc, Czech Republic
[28] Univ Paris 11, CNRS, IN2P3, IPNO, F-91405 Orsay, France
[29] Univ Paris 07, CNRS, IN2P3, Lab AstroParticule & Cosmol, Paris, France
[30] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France
[31] Univ Paris 06, LPNHE, F-75252 Paris 05, France
[32] Univ Grenoble 1, CNRS, IN2P3, INPG,LPSC, Grenoble, France
[33] CNRS, SUBATECH, IN2P3, Nantes, France
[34] Berg Univ Wuppertal, Wuppertal, Germany
[35] Kernforschungszentrum Karlsruhe GmbH, Inst Kernphys, Karlsruhe Inst Technol, D-7500 Karlsruhe, Germany
[36] Inst Prozessdatenverarbeitung & Elekt, Karlsruhe Inst Technol, Karlsruhe, Germany
[37] Univ Karlsruhe, Inst Expt Kernphys, Karlsruhe Inst Technol, D-7500 Karlsruhe, Germany
[38] Max Planck Inst Radioastron, D-5300 Bonn, Germany
[39] Rhein Westfal TH Aachen, Phys Inst 3 A, Aachen, Germany
[40] Univ Hamburg, Hamburg, Germany
[41] Univ Siegen, Siegen, Germany
[42] Ist Nazl Fis Nucl, I-16146 Genoa, Italy
[43] Univ Genoa, Dipartimento Fis, Genoa, Italy
[44] INFN, Laquila, Italy
[45] Univ Aquila, I-67100 Laquila, Italy
[46] Univ Milan, Milan, Italy
[47] Sezione Ist Nazl Fis Nucl, Milan, Italy
[48] Sezione Ist Nazl Fis Nucl, Lecce, Italy
[49] Univ Salento, Dipartimento Fis, Lecce, Italy
[50] Sezione Ist Nazl Fis Nucl, Naples, Italy