A. Abdul Halim13, P. Abreu66, M. Aglietta49,48, I. Allekotte1, K. Almeida Cheminant74,73, A. Almela7,12, R. Aloisio41,42, J. Alvarez-Muñiz72, A. Ambrosone41, J. Ammerman Yebra72, L. Anchordoqui78, B. Andrada7, L. Andrade Dourado41,42, L. Apollonio54,45, C. Aramo46, E. Arnone58,48, J.C. Arteaga Velázquez62, P. Assis66, G. Avila11, E. Avocone52,42, A. Bakalova28, A. Baluta69, F. Barbato41,42, A. Bartz Mocellin77, J.A. Bellido13, C. Berat32, M.E. Bertaina58,48, M. Bianciotto58,48, P.L. Biermanna, V. Binet5, K. Bismark35,7, T. Bister73,74, J. Biteau33,i, J. Blazek28, J. Blümer37, M. Boháčová28, D. Boncioli52,42, C. Bonifazi8, N. Borodai64, J. Brackf, P.G. Brichetto Orchera7,37, F.L. Briechle38, A. Bueno71, S. Buitink15, M. Büsken35,7, A. Bwembya73,74, K.S. Caballero-Mora61, S. Cabana-Freire72, L. Caccianiga54,45, F. Campuzano6, J. Caraça-Valente77, R. Caruso53,43, A. Castellina49,48, F. Catalani18, G. Cataldi44, L. Cazon72, M. Cerda10, B. Čermáková37, A. Cermenati41,42, J.A. Chinellato20, J. Chudoba28, L. Chytka29, R.W. Clay13, A.C. Cobos Cerutti6, R. Colalillo55,46, R. Conceição66, G. Consolati45,50, M. Conte51,44, F. Convenga41,42, D. Correia dos Santos24, P.J. Costa66, C.E. Covault76, M. Cristinziani40, C.S. Cruz Sanchez3, S. Dasso4,2, K. Daumiller37, B.R. Dawson13, R.M. de Almeida24, E.-T. de Boone40, B. de Errico24, J. de Jesús7, S.J. de Jong73,74, J.R.T. de Mello Neto24, I. De Mitri41,42, D. de Oliveira Franco39, F. de Palma51,44, V. de Souza19, E. De Vito51,44, A. Del Popolo53,43, O. Deligny30, N. Denner28, L. Deval48, A. di Matteo48, C. Dobrigkeit20, J.C. D'Olivo63, L.M. Domingues Mendes16,66, Q. Dorosti40, J.C. dos Anjos16, R.C. dos Anjos23, J. Ebr28, F. Ellwanger37, R. Engel35,37, I. Epicoco51,44, M. Erdmann38, A. Etchegoyen7,12, C. Evoli41,42, H. Falcke73,75,74, G. Farrar80, A.C. Fauth20, T. Fehler40, F. Feldbusch36, A. Fernandes66, M. Fernández Alonso14, B. Fick79, J.M. Figueira7, P. Filip35,7, A. Filipčič70,69, T. Fitoussi37, B. Flaggs82, T. Fodran73, A. Franco44, M. Freitas66, T. Fujii81,h, A. Fuster7,12, C. Galea73, B. García6, C. Gaudu34, P.L. Ghia30, U. Giaccari44, F. Gobbi10, F. Gollan7, G. Golup1, M. Gómez Berisso1, P.F. Gómez Vitale11, J.P. Gongora11, J.M. González1, N. González7, D. Góra64, A. Gorgi49,48, M. Gottowik37, F. Guarino55,46, G.P. Guedes21, L. Gülzow37, S. Hahn35, P. Hamal28, M.R. Hampel7, P. Hansen3, V.M. Harvey13, A. Haungs37, T. Hebbeker38, C. Hojvatd, J.R. Hörandel73,74, P. Horvath29, M. Hrabovský29, T. Huege37,15, A. Insolia53,43, P.G. Isar68, M. Ismaiel73,74, P. Janecek28, V. Jilek28, K.-H. Kampert34, B. Keilhauer37, A. Khakurdikar73, V.V. Kizakke Covilakam7,37, H.O. Klages37, M. Kleifges36, J. Köhler37, F. Krieger38, M. Kubatova28, N. Kunka36, B.L. Lago17, N. Langner38, N. Leal7, M.A. Leigui de Oliveira22, Y. Lema-Capeans72, A. Letessier-Selvon31, I. Lhenry-Yvon30, L. Lopes66, J.P. Lundquist69, M. Mallamaci56,43, D. Mandat28, P. Mantschd, F.M. Mariani54,45, A.G. Mariazzi3, I.C. Mariş14, G. Marsella56,43, D. Martello51,44, S. Martinelli37,7, M.A. Martins72, H.-J. Mathes37, J. Matthewsg, G. Matthiae57,47, E. Mayotte77, S. Mayotte77, P.O. Mazurd, G. Medina-Tanco63, J. Meinert34, D. Melo7, A. Menshikov36, C. Merx37, S. Michal28, M.I. Micheletti5, L. Miramonti54,45, M. Mogarkar64, S. Mollerach1, F. Montanet32, L. Morejon34, K. Mulrey73,74, R. Mussa48, W.M. Namasaka34, S. Negi28, L. Nellen63, K. Nguyen79, G. Nicora9, M. Niechciol40, D. Nitz79, D. Nosek27, A. Novikov82, V. Novotny27, L. Nožka29, A. Nucita51,44, L.A. Núñez26, J. Ochoa7,37, C. Oliveira19, L. Östman28, M. Palatka28, J. Pallotta9, S. Panja28, G. Parente72, T. Paulsen34, J. Pawlowsky34, M. Pech28, J. Pękala64, R. Pelayo60, V. Pelgrims14, E.E. Pereira Martins35,7, C. Pérez Bertolli7,37, L. Perrone51,44, S. Petrera41,42, C. Petrucci52, T. Pierog37, M. Pimenta66, M. Platino7, B. Pont73, M. Pourmohammad Shahvar56,43, P. Privitera81, C. Priyadarshi64, M. Prouza28, K. Pytel65, S. Querchfeld34, J. Rautenberg34, D. Ravignani7, J.V. Reginatto Akim20, A. Reuzki38, J. Ridky28, F. Riehn72,j, M. Risse40, V. Rizi52,42, E. Rodriguez7,37, G. Rodriguez Fernandez47, J. Rodriguez Rojo11, S. Rossoni39, M. Roth37, E. Roulet1, A.C. Rovero4, A. Saftoiu67, M. Saharan73, F. Salamida52,42, H. Salazar59, G. Salina47, P. Sampathkumar37, N. San Martin77, J.D. Sanabria Gomez26, F. Sánchez7, E. Santos28, F. Sarazin77, R. Sarmento66, R. Sato11, P. Savina41,42, V. Scherini51,44, H. Schieler37, M. Schimassek30, M. Schimp34, D. Schmidt37, O. Scholten15,b, H. Schoorlemmer73,74, P. Schovánek28, F.G. Schröder82,37, J. Schulte38, T. Schulz28, S.J. Sciutto3, M. Scornavacche7, A. Sedoski7, S. Sehgal34, S.U. Shivashankara69, G. Sigl39, K. Simkova15,14, F. Simon36, R. Šmída81, P. Sommerse, R. Squartini10, M. Stadelmaier37,45,54, S. Stanič69, J. Stasielak64, P. Stassi32, S. Strähnz35, M. Straub38, T. Suomijärvi33, A.D. Supanitsky7, Z. Svozilikova28, K. Syrokvas27, Z. Szadkowski65, F. Tairli13, M. Tambone55,46, A. Tapia25, C. Taricco58,48, C. Timmermans74,73, O. Tkachenko28, P. Tobiska28, C.J. Todero Peixoto18, B. Tomé66, A. Travaini10, P. Travnicek28, M. Tueros3, M. Unger37, R. Uzeiroska34, L. Vaclavek29, M. Vacula29, I. Vaiman41,42, J.F. Valdés Galicia63, L. Valore55,46, P. van Dillen73,74, E. Varela59, V. Vašíčková34, A. Vásquez-Ramírez26, D. Veberič37, I.D. Vergara Quispe3, S. Verpoest82, V. Verzi47, J. Vicha28, S. Vorobiov69, J.B. Vuta28, C. Watanabe24, A.A. Watsonc, A. Weindl37, M. Weitz34, L. Wiencke77, H. Wilczyński64, B. Wundheiler7, B. Yue34, A. Yushkov28, E. Zas72, D. Zavrtanik69,70, M. Zavrtanik70,69
1 Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
2 Departamento de Física and Departamento de Ciencias de la Atmósfera y los Océanos, FCEyN, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
3 IFLP, Universidad Nacional de La Plata and CONICET, La Plata, Argentina
4 Instituto de Astronomía y Física del Espacio (IAFE, CONICET-UBA), Buenos Aires, Argentina
5 Instituto de Física de Rosario (IFIR) - CONICET/U.N.R. and Facultad de Ciencias Bioquímicas y Farmacéuticas U.N.R., Rosario, Argentina
6 Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), and Universidad Tecnológica Nacional - Facultad Regional Mendoza (CONICET/CNEA), Mendoza, Argentina
7 Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
8 International Center of Advanced Studies and Instituto de Ciencias Físicas, ECyT-UNSAM and CONICET, Campus Miguelete - San Martín, Buenos Aires, Argentina
9 Laboratorio Atmósfera - Departamento de Investigaciones en Láseres y sus Aplicaciones - UNIDEF (CITEDEF-CONICET), Argentina
10 Observatorio Pierre Auger, Malargüe, Argentina
11 Observatorio Pierre Auger and Comisión Nacional de Energía Atómica, Malargüe, Argentina
12 Universidad Tecnológica Nacional - Facultad Regional Buenos Aires, Buenos Aires, Argentina
13 University of Adelaide, Adelaide, S.A., Australia
14 Université Libre de Bruxelles (ULB), Brussels, Belgium
15 Vrije Universiteit Brussels, Brussels, Belgium
16 Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, RJ, Brazil
17 Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Petropolis, Brazil
18 Universidade de São Paulo, Escola de Engenharia de Lorena, Lorena, SP, Brazil
19 Universidade de São Paulo, Instituto de Física de São Carlos, São Carlos, SP, Brazil
20 Universidade Estadual de Campinas (UNICAMP), IFGW, Campinas, SP, Brazil
21 Universidade Estadual de Feira de Santana, Feira de Santana, Brazil
22 Universidade Federal do ABC, Santo André, SP, Brazil
23 Universidade Federal do Paraná, Setor Palotina, Palotina, Brazil
24 Universidade Federal do Rio de Janeiro, Instituto de Física, Rio de Janeiro, RJ, Brazil
25 Universidad de Medellín, Medellín, Colombia
26 Universidad Industrial de Santander, Bucaramanga, Colombia
27 Charles University, Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Prague, Czech Republic
28 Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic
29 Palacky University, Olomouc, Czech Republic
30 CNRS/IN2P3, IJCLab, Université Paris-Saclay, Orsay, France
31 Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Sorbonne Université, Université de Paris, CNRS-IN2P3, Paris, France
32 Univ. Grenoble Alpes, CNRS, Grenoble Institute of Engineering Univ. Grenoble Alpes, LPSC-IN2P3, 38000 Grenoble, France
33 Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
34 Bergische Universität Wuppertal, Department of Physics, Wuppertal, Germany
35 Karlsruhe Institute of Technology (KIT), Institute for Experimental Particle Physics, Karlsruhe, Germany
36 Karlsruhe Institute of Technology (KIT), Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany
37 Karlsruhe Institute of Technology (KIT), Institute for Astroparticle Physics, Karlsruhe, Germany
38 RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
39 Universität Hamburg, II. Institut für Theoretische Physik, Hamburg, Germany
40 Universität Siegen, Department Physik - Experimentelle Teilchenphysik, Siegen, Germany
41 Gran Sasso Science Institute, L'Aquila, Italy
42 INFN Laboratori Nazionali del Gran Sasso, Assergi (L'Aquila), Italy
43 INFN, Sezione di Catania, Catania, Italy
44 INFN, Sezione di Lecce, Lecce, Italy
45 INFN, Sezione di Milano, Milano, Italy
46 INFN, Sezione di Napoli, Napoli, Italy
47 INFN, Sezione di Roma “Tor Vergata”, Roma, Italy
48 INFN, Sezione di Torino, Torino, Italy
49 Osservatorio Astrofisico di Torino (INAF), Torino, Italy
50 Politecnico di Milano, Dipartimento di Scienze e Tecnologie Aerospaziali , Milano, Italy
51 Università del Salento, Dipartimento di Matematica e Fisica “E. De Giorgi”, Lecce, Italy
52 Università dell'Aquila, Dipartimento di Scienze Fisiche e Chimiche, L'Aquila, Italy
53 Università di Catania, Dipartimento di Fisica e Astronomia “Ettore Majorana“, Catania, Italy
54 Università di Milano, Dipartimento di Fisica, Milano, Italy
55 Università di Napoli “Federico II”, Dipartimento di Fisica “Ettore Pancini”, Napoli, Italy
56 Università di Palermo, Dipartimento di Fisica e Chimica ”E. Segrè”, Palermo, Italy
57 Università di Roma “Tor Vergata”, Dipartimento di Fisica, Roma, Italy
58 Università Torino, Dipartimento di Fisica, Torino, Italy
59 Benemérita Universidad Autónoma de Puebla, Puebla, México
60 Unidad Profesional Interdisciplinaria en Ingeniería y Tecnologías Avanzadas del Instituto Politécnico Nacional (UPIITA-IPN), México, D.F., México
61 Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, México
62 Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
63 Universidad Nacional Autónoma de México, México, D.F., México
64 Institute of Nuclear Physics PAN, Krakow, Poland
65 University of Łódź, Faculty of High-Energy Astrophysics,Łódź, Poland
66 Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisboa, Portugal
67 “Horia Hulubei” National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania
68 Institute of Space Science, Bucharest-Magurele, Romania
69 Center for Astrophysics and Cosmology (CAC), University of Nova Gorica, Nova Gorica, Slovenia
70 Experimental Particle Physics Department, J. Stefan Institute, Ljubljana, Slovenia
71 Universidad de Granada and C.A.F.P.E., Granada, Spain
72 Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
73 IMAPP, Radboud University Nijmegen, Nijmegen, The Netherlands
74 Nationaal Instituut voor Kernfysica en Hoge Energie Fysica (NIKHEF), Science Park, Amsterdam, The Netherlands
75 Stichting Astronomisch Onderzoek in Nederland (ASTRON), Dwingeloo, The Netherlands
76 Case Western Reserve University, Cleveland, OH, USA
77 Colorado School of Mines, Golden, CO, USA
78 Department of Physics and Astronomy, Lehman College, City University of New York, Bronx, NY, USA
79 Michigan Technological University, Houghton, MI, USA
80 New York University, New York, NY, USA
81 University of Chicago, Enrico Fermi Institute, Chicago, IL, USA
82 University of Delaware, Department of Physics and Astronomy, Bartol Research Institute, Newark, DE, USA
———
a Max-Planck-Institut für Radioastronomie, Bonn, Germany
b also at Kapteyn Institute, University of Groningen, Groningen, The Netherlands
c School of Physics and Astronomy, University of Leeds, Leeds, United Kingdom
d Fermi National Accelerator Laboratory, Fermilab, Batavia, IL, USA
e Pennsylvania State University, University Park, PA, USA
f Colorado State University, Fort Collins, CO, USA
g Louisiana State University, Baton Rouge, LA, USA
h now at Graduate School of Science, Osaka Metropolitan University, Osaka, Japan
i Institut universitaire de France (IUF), France
j now at Technische Universität Dortmund and Ruhr-Universität Bochum, Dortmund and Bochum, Germany
The successful installation, commissioning, and operation of the Pierre Auger Observatory would not have been possible without the strong commitment and effort from the technical and administrative staff in Malargüe. We are very grateful to the following agencies and organizations for financial support:
Argentina – Comisión Nacional de Energía Atómica; Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Gobierno de la Provincia de Mendoza; Municipalidad de Malargüe; NDM Holdings and Valle Las Leñas; in gratitude for their continuing cooperation over land access; Australia – the Australian Research Council; Belgium – Fonds de la Recherche Scientifique (FNRS); Research Foundation Flanders (FWO), Marie Curie Action of the European Union Grant No. 101107047; Brazil – Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Financiadora de Estudos e Projetos (FINEP); Fundação de Amparo à Pesquisa do Estado de Rio de Janeiro (FAPERJ); São Paulo Research Foundation (FAPESP) Grants No. 2019/10151-2, No. 2010/07359-6 and No. 1999/05404-3; Ministério da Ciência, Tecnologia, Inovações e Comunicações (MCTIC); Czech Republic – GACR 24-13049S, CAS LQ100102401, MEYS LM2023032, CZ.02.1.01/0.0/0.0/16_013/0001402, CZ.02.1.01/0.0/0.0/18_046/0016010 and CZ.02.1.01/0.0/0.0/17_049/0008422 and CZ.02.01.01/00/22_008/0004632; France – Centre de Calcul IN2P3/CNRS; Centre National de la Recherche Scientifique (CNRS); Conseil Régional Ile-de-France; Département Physique Nucléaire et Corpusculaire (PNC-IN2P3/CNRS); Département Sciences de l'Univers (SDU-INSU/CNRS); Institut Lagrange de Paris (ILP) Grant No. LABEX ANR-10-LABX-63 within the Investissements d'Avenir Programme Grant No. ANR-11-IDEX-0004-02; Germany – Bundesministerium für Bildung und Forschung (BMBF); Deutsche Forschungsgemeinschaft (DFG); Finanzministerium Baden-Württemberg; Helmholtz Alliance for Astroparticle Physics (HAP); Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF); Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen; Ministerium für Wissenschaft, Forschung und Kunst des Landes Baden-Württemberg; Italy – Istituto Nazionale di Fisica Nucleare (INFN); Istituto Nazionale di Astrofisica (INAF); Ministero dell'Università e della Ricerca (MUR); CETEMPS Center of Excellence; Ministero degli Affari Esteri (MAE), ICSC Centro Nazionale di Ricerca in High Performance Computing, Big Data and Quantum Computing, funded by European Union NextGenerationEU, reference code CN_00000013; México – Consejo Nacional de Ciencia y Tecnología (CONACYT) No. 167733; Universidad Nacional Autónoma de México (UNAM); PAPIIT DGAPA-UNAM; The Netherlands – Ministry of Education, Culture and Science; Netherlands Organisation for Scientific Research (NWO); Dutch national e-infrastructure with the support of SURF Cooperative; Poland -- Ministry of Education and Science, grants No. DIR/WK/2018/11 and 2022/WK/12; National Science Centre, grants No. 2016/22/M/ST9/00198, 2016/23/B/ST9/01635, 2020/39/B/ST9/01398, and 2022/45/B/ST9/02163; Portugal – Portuguese national funds and FEDER funds within Programa Operacional Factores de Competitividade through Fundação para a Ciência e a Tecnologia (COMPETE); Romania – Ministry of Research, Innovation and Digitization, CNCS-UEFISCDI, contract no. 30N/2023 under Romanian National Core Program LAPLAS VII, grant no. PN 23 21 01 02 and project number PN-III-P1-1.1-TE-2021-0924/TE57/2022, within PNCDI III; Slovenia – Slovenian Research Agency, grants P1-0031, P1-0385, I0-0033, N1-0111; Spain – Ministerio de Ciencia e Innovación/Agencia Estatal de Investigación (PID2019-105544GB-I00, PID2022-140510NB-I00 and RYC2019-027017-I), Xunta de Galicia (CIGUS Network of Research Centers, Consolidación 2021 GRC GI-2033, ED431C-2021/22 and ED431F-2022/15), Junta de Andalucía (SOMM17/6104/UGR and P18-FR-4314), and the European Union (Marie Sklodowska-Curie 101065027 and ERDF); USA – Department of Energy, Contracts No. DE-AC02-07CH11359, No. DE-FR02-04ER41300, No. DE-FG02-99ER41107 and No. DE-SC0011689; National Science Foundation, Grant No. 0450696, and NSF-2013199; The Grainger Foundation; Marie Curie-IRSES/EPLANET; European Particle Physics Latin American Network; and UNESCO.
Last modified on 2025-07-08.