The Pierre Auger Collaboration

Centro Atómico Bariloche (CNEA); Instituto Balseiro (CNEA and UNCuyo); CONICET, 8400 San Carlos de Bariloche, Río Negro, Argentina
I. Allekotte, H. Asorey, X. Bertou, G. Golup, M. Gómez Berisso, D. Harari, S. Mollerach, J. Pochon, E. Roulet

Instituto de Astronomía y Física del Espacio (CONICET), CC 67, Suc. 28 (1428) Buenos Aires, Argentina
A. Pichel, A.C. Rovero, A. Tamashiro

Laboratorio Tandar (CNEA); CONICET; Univ. Tec. Nac. (Reg. Buenos Aires), Av. Gral. Paz 1499, (1650) San Martín, Buenos Aires, Argentina
G. Avila, E. Colombo, A. Etchegoyen, A. Filevich, M.C. Medina, D. Melo, M.I. Micheletti, F. Sánchez, N. Smetniansky De Grande, A.D. Supanitsky, O. Wainberg

Pierre Auger Southern Observatory, Av. San Martin Norte 304, (5613) Malargüe, Prov. De Mendoza, Argentina
M. Santander, R. Sato

Universidad Nacional de la Plata, Facultad de Ciencias Exactas, Departamento de Física and IFLP/CONICET; Univ. Nac. de Buenos Aires, FCEyN, Departamento de Física, C.C. 67, (1900) La Plata, Argentina
D. Badagnani, M.T. Dova, L. Epele, F. Gomez Albarracin, C. Grunfeld, M.E. Manceñido, N. Martinez, R. Piegaia, S.J. Sciutto, M. Tueros, A. Veiga, H. Wahlberg

Universidad Tecnológica Nacional, Regionales Mendoza y San Rafael; CONICET; CEILAP-CITEFA, Rodríguez 273 Mendoza, Argentina
J. Abraham, B. García, J. Gitto, F. Gobbi, J.P. Gongora, A. Lucero, L. Otero, J. Pallotta, E.J. Quel, A. Risi, M. Videla

University of Adelaide, Dept. of Physics, Adelaide, S.A. 5005, Australia
S.B. Clay, R.W. Clay, B.R. Dawson, J. Sorokin, M.G. Winnick

Universidad Catolica de Bolivia, Av. 16 Julio 1732, POB 5829, La Paz, Bolivia
C. Aguirre

Universidad Mayor de San Andrés, Av. Villazón Nº 1995, Monoblock Central, Bolivia
R. Ticona, A. Velarde

Centro Brasileiro de Pesquisas Fisicas, Rua Dr. Xavier Sigaud, 150, CEP 22290-180 Rio de Janeiro, RJ, Brazil
J.C. Anjos, A.F. Barbosa, S.L.C. Barroso, C. Bonifazi, E.M. Santos, R.C. Shellard

Universidade de Sao Paulo, Inst. de Fisica, Cidade Universitaria Caixa Postal 66318, Caixa Postal 66318, 05315-970 Sao Paulo, SP, Brazil
P. Gouffon

Universidade de São Paulo, Instituto Astronomico e Geofisico, Cidade Universitaria, Rua do Matao 1226, 05508-900 Sao Paulo, SP, Brazil
V. de Souza, H.C. Reis

Universidade Estadual de Campinas, Gleb Wataghin Physics Institute (IFGW), Departamento de Raios Cosmicos e Cronologia, CP 6165, 13083-970, Campinas, SP, Brazil
H.M.J. Barbosa, J.A. Chinellato, R.M. de Almeida, L.A. de Carvalho, W.J.M. de Mello Junior, C. Dobrigkeit , C.O. Escobar, A.C. Fauth, E. Kemp, M.A. Muller, H. Nogima, L. Prado Junior, J. Takahashi, C.J. Todero Peixoto

Univ. Estadual de Feira de Santana, Departamento de Fisica, Campus Universitario, BR 116, KM 03, 44031-460 Feira de Santana, Brazil
G.P. Guedes

Universidade Federal da Bahia, Campus da Ondina, 40210-340 Salvador, BA, Brazil
I.M. Pepe

Universidade Federal do ABC, Centro de Ciências Naturais e Humanas, Rua Santa Adélia, 166, Bairro Bangu, 09.210-170 Santo André, SP, Brazil
M.A. Leigui de Oliveira

Univ. Federal do Rio de Janeiro (UFRJ), Instituto de Física, Cidade Universitaria, Caixa Postal 68528, 21945-970 Rio de Janeiro, RJ, Brazil
J.R.T. de Mello Neto, B.L. Lago, L.F.A. Oliveira, B.B. Siffert

Univ. Federal Fluminense, Inst. de Fisica, Campus da Praia Vermelha, 24210-340 Niterói, RJ, Brazil
M. Gonçalves do Amaral

Charles University, Institute of Particle & Nuclear Physics, Faculty of Mathematics and Physics, V Holesovickach 2, CZ-18000 Prague 8, Czech Republic
D. Nosek

Institute of Physics of the Academy of Sciences of the Czech Republic, Na Slovance 2, CZ-182 21 Praha 8, Czech Republic
M. Bohácová, M. Hrabovský, D. Mandat, L. Nožka, M. Palatka, M. Pech, J. Rídký, P. Schovánek, R. Šmída, P. Travnicek

Institut de Physique Nucléaire, Université Paris-Sud 11 and IN2P3/CNRS, 15, rue Georges Clemenceau, 91400 Orsay, France
J. Aublin, O. Deligny, D. Dornic, I. Lhenry-Yvon, T. Suomijärvi, V. van Elewyck

Laboratoire AstroParticule et Cosmologie, Université Paris VII, 11, Place Marcelin Berthelot, F-75231 Paris CEDEX 05, France
D. Allard, E. Armengaud, T. Beau, J.M. Brunet, J.N. Capdevielle, C. Lachaud, G. Maurin, E. Parizot, B. Revenu, D. Semikoz, G. Sigl, G. Tristram, S. Vorobiov

Laboratoire de l'Accélérateur Linéaire, Université Paris-Sud 11 and IN2P3/CNRS, BP 34, Batiment 200, F-91898 Orsay cedex, France
A. Cordier, S. Dagoret-Campagne, X. Garrido, D. Monnier Ragaigne, M. Urban

Laboratoire de Physique Nucléaire et de Hautes Energies, Université Paris 6 & 7 and IN2P3/CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France
P. Billoir, O. Blanch-Bigas, M. Boratav, J.C. Hamilton, A. Letessier-Selvon, C. Roucelle, B. Rouillé-d'Orfeuil, A. Zech

Laboratoire de Physique Subatomique et de Cosmologie (LPSC), IN2P3/CNRS, Université Joseph-Fourier (Grenoble 1), 53, ave. des Martyrs, F-38026 Grenoble CEDEX, France
C. Berat, J. Chauvin, D.-H. Koang, D. Lebrun, F. Montanet, A. Stutz

Bergische Universität Wuppertal, Fachbereich C - Physik, Gauß Str. 20, D - 42097 Wuppertal, Germany
M. Barkhausen, K.H. Becker, A. Ewers, D. Fuhrmann, H. Geenen, K.H. Kampert, N. Nierstenhöfer, J. Rautenberg, M. Risse, S. Robbins, V. Scherini, O. Tascau

Forschungszentrum Karlsruhe, Institut für Kernphysik, Postfach 3640, D - 76021 Karlsruhe, Germany
H. Blümer, K. Daumiller, R. Engel, A. Haungs, D. Heck, T. Huege, H.O. Klages, J. Kleinfeller, H.J. Mathes, Chr. Meurer, J. Oehlschläger, T. Pierog, M. Roth, H. Schieler, F. Schüssler, R. Ulrich, M. Unger

Forschungszentrum Karlsruhe, Institut für Prozessdatenverarbeitung und Elektronik, Postfach 3640, D - 76021 Karlsruhe, Germany
T. Asch, H. Gemmeke, M. Kleifges, A. Kopmann, O. Krömer, N. Kunka, A. Menshikov, D. Tscherniakhovski, J. Xu

Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D - 53121 Bonn, Germany
P.L. Biermann, A. Meli

RWTH Aachen, III. Physikalisches Institut A, Physikzentrum, Huyskensweg, D - 52056 Aachen, Germany
H. Dembinski, M. Erdmann, T. Hebbeker, M. Leuthold, C. Wiebusch

Universität Karlsruhe (TH), Institut für Experimentelle Kernphysik (IEKP), Postfach 6980, D – 76128 Karlsruhe, Germany
T. Bergmann, H. Blümer, K.S. Caballero-Mora, D. Gonzalez, D. Góra, J. Hörandel, B. Keilhauer, I.C. Maris, S. Ostapchenko, T. Schmidt, A. Tamburro, T. Waldenmaier

Universität Siegen, Fachbereich 7 Physik - Experimentelle Teilchenphysik, Emmy Noether-Campus, Walter- Flex-Str. 3, D - 57068 Siegen, Germany
T. Bäcker, P. Buchholz, I. Fleck, C. Grupen, Y. Kolotaev, M. Ziolkowski

Dipartimento di Fisica dell'Università de l'Aquila and INFN, Via Vetoio, I-67010 Coppito, Aquila, Italy
P. Blasi, M. Iarlori, S. Petrera, V. Rizi, F. Salamida

Dipartimento di Fisica dell'Università di Lecce and Sezione INFN, via Arnesano, I-73100 Lecce, Italy
P. Bernardini, G. Cataldi, I. De Mitri, G. Mancarella, D. Martello, L. Perrone

Dipartimento di Fisica dell'Università di Milano and Sezione INFN, via Celoria 16, I-20133 Milan, Italy
D.V. Camin, C. De Donato, V. Grassi

Dipartimento di Fisica dell'Università di Napoli and Sezione INFN, Via Cintia 2, 80123 Napoli, Italy
M. Ambrosio, C. Aramo, A. Della Selva, D. D'Urso, F. Guarino, G. Miele, O. Pisanti, L. Valore

Dipartimento di Fisica dell'Università di Roma II “Tor Vergata” and Sezione INFN, Via della Ricerca Scientifica, I-00133 Roma, Italy
C. Delle Fratte, C. Di Giulio, G. Matthiae, P. Petrinca, P. Privitera, J. Rodriguez Martino, J. Rodriguez Rojo, G. Salina, E. Strazzeri, V. Verzi

Dipartimento di Fisica dell'Università di Catania and Sezione INFN, Corso Italia, 57, I-95129 Catania, Italy
R. Caruso, D. Fazio, R. Fonte, A. Insolia, M. Scuderi, D. Torresi

Dipartimento di Fisica Sperimentale dell'Università di Torino and Sezione INFN, Via Pietro Giuria, 1, I-10125 Torino, Italy
R. Cester, D. Maurizio, E. Menichetti, R. Mussa, G. Sequeiros, A. Tonachini

Istituto di Fisica dello Spazio Interplanetario (INAF), sezione di Torino and Dipartimento di Fisica Generale dell'Universitá and INFN Torino, Via P. Giuria 1, 10125 Torino, Italy
M. Aglietta, R. Bonino, A. Castellina, A. Chiavassa, W. Fulgione, P.L. Ghia, A. Gorgi, S. Maldera, C. Morello, G. Navarra, F. Suarez

INFN, Laboratori Nazionali del Gran Sasso, Strada Statale 17/bis Km 18+910, I-67010 Assergi (L'Aquila), Italy
F. Arneodo, A. Grillo, S. Parlati

Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Florence, Italy
P. Blasi

Benemérita Universidad Autónoma de Puebla (BUAP), Ap. Postal J -- 48, 72500 Puebla, Puebla, Mexico
C. Alvarez, A. Fernández, R. López, O. Martínez, E. Moreno, C. Robledo, H. Salazar

Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV), Apartado Postal 14-740, 07000 México, D.F., Mexico
M. González, J. Martínez, R. Pelayo, A. Zepeda

Universidad Michoacana de San Nicolas de Hidalgo (UMSNH), Edificio C-3 Cd Universitaria, C.P. 58040 Morelia, Michoacan, Mexico
U. Cotti, L. Villaseñor

Universidad Nacional Autonoma de Mexico (UNAM), Apdo. Postal 20-364, 01000 Mexico, D.F., Mexico
J.C. D'Olivo, G. Medina-Tanco, B. Morales, L. Nellen, F. Sánchez, J.F. Valdés Galicia

Department of Astrophysics, IMAPP, Radboud University, 6500 GL Nijmegen, Netherlands
S.J. de Jong, H. Falcke, A. Horneffer, J. Kuijpers, C. Timmermans

Kernfysisch Versneller Instituut (KVI), Rijksuniversiteit Groningen, Zernikelaan 25, NL-9747 AA Groningen, Netherlands
J. Bacelar, M.N. Harakeh, S. Harmsma, O. Scholten, A.M. van den Berg

NIKHEF, POB 41882, NL-1009 DB Amsterdam, Netherlands
C. Timmermans

ASTRON, PO Box 2, 7990 AA Dwingeloo, Netherlands
H. Falcke

Institute of Nuclear Physics PAN, Radzikowskiego 52, 31-342 Cracow, Poland
D. Góra, P. Homola, J. Pekala, B. Wilczynska, H. Wilczynski

University of Lódz, Pomorska 149/153, 90 236 Lódz, Poland
M. Giller, A. Smialkowski, Z. Szadkowski, W. Tkaczyk, G. Wieczorek

University of Nova Gorica, Laboratory for Astroparticle Physics, Vipavska 13, POB 301, SI-5000 Nova Gorica, Slovenia
S. Ferry, A. Filipcic, M. Horvat, D. Veberic, M. Zavrtanik, D. Zavrtanik

Departamento de Fisica Atomica, Molecular y Nuclear, Facultad de Ciencias Fisicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
F. Arqueros, F. Blanco, D. Garcia-Pinto, M. Monasor, M. Ortiz, G. Ros, J. Rosado

Space Plasmas and Astroparticle Group, Universidad de Alcalá, Pza. San Diego, s/n, 28801 Alcalá de Henares (Madrid), Spain
L. del Peral, R. Gómez Herrero, J. Gutiérrez, M. Monasor, D. Rodríguez Frías, G. Ros

Departamento de Física de Partículas, Campus Sur, Universidad, E-15782 Santiago de Compostela, Spain
J. Alvarez-Muñiz, P. Facal San Luis, A. Lopez Agüera, D. Newton, V.M. Olmos-Gilbaja, G. Parente, G. Rodriguez, I. Valiño, R.A. Vázquez, E. Zas

Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3NP, United Kingdom
S. Sarkar

Institute of Integrated Information Systems, School of Electronic Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
V. Tunnicliffe, P. Walker

University of Leeds, School of Physics and Astronomy, Leeds, LS2 9JT, United Kingdom
C. Bleve , J. Knapp, A.G. Mariazzi, P. Skelton, B.E. Smith, A.A. Watson, C. Wileman, M. Zha

Argonne National Laboratory, HEP Division, Argonne, IL 60439, United States
H. Spinka

Case Western Reserve University, Dept. of Physics, Cleveland, OH 44106, United States
C.E. Covault, F. Ferrer

Colorado State University, Department of Physics, Fort Collins, CO 80523, United States
P. Bauleo, L. Garrard, J.L. Harton, R. Knapik, Y. Petrov, D. Warner

Columbia University, Dept. of Physics, New York, NY 10027, United States
S. BenZvi, B. Connolly, M. Prouza, S. Westerhoff

Fermilab, MS367, POB 500, Batavia, IL 60510-0500, United States
A. Chou, N. Fazzini, H. Glass, C. Hojvat, M. Kaducak, P. LeBrun, M. Malek, P. Mantsch, P.O. Mazur, C. Newman-Holmes, H. Spinka, L. Voyvodic

Louisiana State University, Dept. of Physics and Astronomy, Baton Rouge, LA 70803-4001, United States
A. Dorofeev, J.G. Gonzalez, J. Matthews, M. McEwen, R.R. McNeil, R. Meyhandan, T.A. Porter

Michigan Technological University, Physics Dept., 1400 Townsend Drive, Houghton, MI 49931-1295, United States
J. Chye, J.C. Diaz, B. Fick, D. Nitz, P. Younk

Northeastern University, Department of Physics, 110 Forsyth Street, Boston, MA 02115-5096, United States
L. Anchordoqui, T. McCauley, T. Paul, S. Reucroft, J. Swain

Ohio State University, 2400 Olentangy River Road, Columbus, OH 43210-1061, United States
P. Allison, J. Beatty, C. Morris

Pennsylvania State University, Department of Physics, 104 Davey Lab, University Park, PA 16802-6300, United States
B.S. Atulugama, S. Coutu, M. Roberts, P. Sommers

Southern University, Dept. of Physics, Baton Rouge, LA 70813-0400, United States
J. Matthews

University of California, Los Angeles (UCLA), Department of Physics and Astronomy, Los Angeles, CA 90095, United States
K. Arisaka, D. Barnhill, P. Boghrat, G. Gelmini, M.D. Healy, O. Kalashev, A. Kusenko, J. Lee, T. Ohnuki, W. Slater, A. Tripathi

University of Chicago, Enrico Fermi Institute, 5640 S. Ellis Ave., Chicago, IL 60637, United States
M. Ave, N.G. Busca, L. Cazón-Boado, J. Cronin, A. Olinto, T. Venters, T. Yamamoto

University of Colorado, Physics Department, Boulder, CO 80309-0446, United States
J. Brack

University of Minnesota, School of Physics and Astronomy, 116 Church St. SE, Minneapolis, MN 55455, United States
B. Cai, M.A. DuVernois

University of Nebraska, Dept. of Physics and Astronomy, 116 Brace Lab, Lincoln, NE 68588-0111, United States
D. Claes, G.R. Snow

University of New Mexico, Dept. of Physics and Astronomy, 800 Yale, Albuquerque, NM 87131, United States
B.R. Becker, M.S. Gold, J.D. Hague, J.A.J. Matthews, W. Miller

University of Utah, 115 S. 1400 East #201, Salt Lake City, UT 84112-0830, United States
J.A. Bellido, M. Mostafá, P. Sokolsky, L. Wiencke

University of Wisconsin-Milwaukee, Dept. of Physics, Milwaukee, WI 53201, United States
L. Anchordoqui

Institute for Nuclear Science and Technology (INST), 5T-160 Hoang Quoc Viet Street, Nghia Do, Cau Giay, Hanoi, Vietnam
T. Nguyen Thi, Dong Pham Ngoc, Diep Pham Ngoc, T.N. Pham Thi