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Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory

Pedro Abreu, Marco Aglietta, Justin M. Albury, Ingomar Allekotte, Kevin Almeida Cheminant, Alejandro Almela, Jaime Alvarez-Muñiz, Rafael Alves Batista, Juan Ammerman Yebra, Gioacchino Alex Anastasi, Luis Anchordoqui, Belén Andrada (+363 others)
2022 The astrophysical journal 935(2)  

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A promising energy range to look for angular correlations between cosmic rays of extragalactic origin and their sources is at the highest energies, above a few tens of EeV (1 EeV ≡ 10 18 eV). Despite the flux of these particles being extremely low, the area of ∼3000 km 2 covered at the Pierre Auger Observatory, and the 17 yr data-taking period of the Phase 1 of its operations, have enabled us to measure the arrival directions of more than 2600 ultrahigh-energy cosmic rays above 32 EeV. We
more » ... h this data set, the largest available at such energies from an integrated exposure of 122,000 km 2 sr yr, and search it for anisotropies over the 3.4π steradians covered with the Observatory. Evidence for a deviation in excess of isotropy at intermediate angular scales, with ∼15°Gaussian spread or ∼25°top-hat radius, is obtained at the 4σ significance level for cosmic-ray energies above ∼40 EeV.
doi:10.18154/rwth-2022-09246 fatcat:atgetmqtinbqtjbnriasfg5kji
Citation

Pedro Abreu, Marco Aglietta, Justin M. Albury, Ingomar Allekotte, Kevin Almeida Cheminant, Alejandro Almela, Jaime Alvarez-Muñiz, Rafael Alves Batista, Juan Ammerman Yebra, Gioacchino Alex Anastasi, Luis Anchordoqui, Belén Andrada, Sofia Andringa, Carla Aramo, Paulo Ricardo Araújo Ferreira, Enrico Arnone, Juan Carlos Arteaga Velázquez, Hernán Gonzalo Asorey, Pedro Assis, Gualberto Avila, Emanuele Avocone, Alina Mihaela Badescu, Alena Bakalova, Alexandru Balaceanu, Felicia Barbato, Jose A. Bellido, Corinne Berat, Mario Edoardo Bertaina, Gopal Bhatta, Peter Biermann, Virginia Binet, Kathrin Bismark, Teresa Karolin Bister, Jonathan Biteau, Jiri Blazek, Carla Bleve, Johannes Blümer, Martina Boháčová, Denise Boncioli, Carla Bonifazi, Luan Bonneau Arbeletche, Nataliia Borodai, Ana Martina Botti, Jeffrey Brack, Thomas Bretz, P. Gabriel Brichetto Orchera, Florian Lukas Briechle, Peter Buchholz, Antonio Bueno, Stijn Buitink, Mario Buscemi, Max Büsken, Karen S. Caballero-Mora, Lorenzo Caccianiga, Fabrizia Canfora, Ioana Caracas, Rossella Caruso, Antonella Castellina, Fernando Catalani, Gabriella Cataldi, Lorenzo Cazon, Marcos Cerda, Jose Augusto Chinellato, Jiri Chudoba, Ladislav Chytka, Roger W. Clay, Agustín Cobos Cerutti, Roberta Colalillo, Alan Coleman, Maria Rita Coluccia, Ruben Conceição, Antonio Condorelli, Giovanni Consolati, Fernando Contreras, Fabio Convenga, Diego Correia dos Santos, Corbin Covault, Sergio Dasso, Kai Daumiller, Bruce R. Dawson, Jarryd A. Day, Rogerio M. de Almeida, Joaquín de Jesús, Sijbrand J. de Jong, J. R. T. de Mello Neto, Ivan De Mitri, Jaime de Oliveira, Danelise de Oliveira Franco, Francesco de Palma, Vitor de Souza, Emanuele De Vito, Antonino Del Popolo, Mariano del Río, Olivier Deligny, Luca Deval, Armando di Matteo, Madalina Dobre, Carola Dobrigkeit, Juan Carlos D'Olivo, Luis Miguel Domingues Mendes, Rita dos Anjos, Maria Teresa Dova, Jan Ebr, Ralph Engel, Italo Epicoco, Martin Erdmann, Carlos O. Escobar, Alberto Etchegoyen, Heino Falcke, John Farmer, Glennys Farrar, Anderson Fauth, Norberto Fazzini, Fridtjof Feldbusch, Francesco Fenu, Brian Fick, Juan Manuel Figueira, Andrej Filipčič, Thomas Fitoussi, Tomas Fodran, Toshihiro Fujii, Alan Fuster, Cristina Galea, Claudio Galelli, Beatriz García, Hartmut Gemmeke, Flavia Gesualdi, Alexandru Gherghel-Lascu, Piera Luisa Ghia, Ugo Giaccari, Marco Giammarchi, Jonas Glombitza, Fabian Gobbi, Fernando Gollan, Geraldina Golup, Mariano Gómez Berisso, Primo F. Gómez Vitale, Juan Pablo Gongora, Juan Manuel González, Nicolás González, Isabel Goos, Dariusz Góra, Alessio Gorgi, Marvin Gottowik, Trent D. Grubb, Fausto Guarino, Germano Guedes, Eleonora Guido, Steffen Hahn, Petr Hamal, Matías Rolf Hampel, Patricia Hansen, Diego Harari, Violet M. Harvey, Andreas Haungs, Thomas Hebbeker, Dieter Heck, Gary C. Hill, Carlos Hojvat, Jörg Hörandel, Pavel Horvath, Miroslav Hrabovský, Tim Huege, Antonio Insolia, Paula Gina Isar, Petr Janecek, Jeffrey A. Johnsen, Jakub Jurysek, Alex Kääpä, Karl-Heinz Kampert, Bianca Keilhauer, Abha Khakurdikar, Varada Varma Kizakke Covilakam, Hans Klages, Matthias Kleifges, Jonny Kleinfeller, Felix Knapp, Norbert Kunka, Bruno L. Lago, Niklas Uwe Langner, Marcelo Augusto Leigui de Oliveira, Vladimir Lenok, Antoine Letessier-Selvon, Isabelle Lhenry-Yvon, Domenico Lo Presti, Luis Lopes, Rebeca López, Lu Lu, Quentin Luce, Jon Paul Lundquist, Allan Machado Payeras, Giovanni Mancarella, Dusan Mandat, Bradley C. Manning, Julien Manshanden, Paul Mantsch, Sullivan Marafico, Federico Maria Mariani, Analisa Mariazzi, Ioana Mariş, Giovanni Marsella, Daniele Martello, Sara Martinelli, Oscar Martínez Bravo, Massimo Mastrodicasa, Hermann-Josef Mathes, James Matthews, Giorgio Matthiae, Eric Mayotte, Sonja Mayotte, Peter Mazur, Gustavo Medina-Tanco, Diego Melo, Alexander Menshikov, Stanislav Michal, Maria Isabel Micheletti, Lino Miramonti, Silvia Mollerach, François Montanet, Leonel Morejon, Carlo Morello, Miguel Mostafá, Ana L. Müller, Marcio Aparecido Muller, Katharine Mulrey, Roberto Mussa, Marco Muzio, Wilson M. Namasaka, Alina Nasr-Esfahani, Lukas Nellen, Gabriela Nicora, Mihai Niculescu-Oglinzanu, Marcus Niechciol, Dave Nitz, Ian Norwood, Dalibor Nosek, Vladimir Novotny, Libor Nožka, Achille Nucita, Luis Núñez, Cainã Oliveira, Miroslav Palatka, Juan Pallotta, Philipp Papenbreer, Gonzalo Parente, Alejandra Parra, Jannis Pawlowsky, Miroslav Pech, Jan Pękala, Rodrigo Pelayo, Jesús Peña-Rodriguez, Edyvania Emily Pereira Martins, Johnnier Perez Armand, Carmina Pérez Bertolli, Lorenzo Perrone, Sergio Petrera, Camilla Petrucci, Tanguy Pierog, Mário Pimenta, Valerio Pirronello, Manuel Platino, Bjarni Pont, Mart Pothast, Paolo Privitera, Michael Prouza, Andrew Puyleart, Sven Querchfeld, Julian Rautenberg, Diego Ravignani, Maximilian Reininghaus, Jan Ridky, Felix Riehn, Markus Risse, Vincenzo Rizi, Washington Rodrigues de Carvalho, Jorge Rubén Rodriguez Rojo, Matías J. Roncoroni, Simone Rossoni, Markus Roth, Esteban Roulet, Adrian Rovero, Philip Ruehl, Alexandra Saftoiu, Mohit Saharan, Francesco Salamida, Humberto Salazar, Gaetano Salina, Jose Sanabria Gomez, Federico Sánchez, Edivaldo Moura Santos, Eva Santos, Fred Sarazin, Raul Sarmento, Ricardo Sato, Pierpaolo Savina, Christoph M. Schäfer, Viviana Scherini, Harald Schieler, Martin Schimassek, Michael Schimp, Felix Schlüter, David Schmidt, Olaf Scholten, Harm Schoorlemmer, Petr Schovánek, Frank G. Schröder, Josina Schulte, Tobias Schulz, Sergio Sciutto, Marina Scornavacche, Alberto Segreto, Srijan Sehgal, Ronald C. Shellard, Guenter Sigl, Gaia Silli, Octavian Sima, Raluca Smau, Radomir Šmída, Paul Sommers, Jorge F. Soriano, Ruben Squartini, Maximilian Stadelmaier, Denis Stanca, Samo Stanič, Jaroslaw Stasielak, Patrick Stassi, Maximilian Straub, Alexander Streich, Mauricio Suárez-Durán, Tristan Sudholz, Tiina Suomijärvi, A. Daniel Supanitsky, Zbigniew Szadkowski, Alex Tapia, Carla Taricco, Charles Timmermans, Olena Tkachenko, Petr Tobiska, Carlos J. Todero Peixoto, Bernardo Tomé, Zoé Torrès, Andres Travaini, Petr Travnicek, Caterina Trimarelli, Matias Tueros, Ralf Ulrich, Michael Unger, Lukáš Vaclavek, Martin Vacula, Jose F. Valdés Galicia, Laura Valore, Enrique Varela, Adriana Vásquez-Ramírez, Darko Veberič, Cynthia Ventura, Indira D. Vergara Quispe, Valerio Verzi, Jakub Vicha, Jacco Vink, Serguei Vorobiov, Hernan Wahlberg, Clara Watanabe, Alan Watson, Andreas Weindl, Lawrence Wiencke, Henryk Wilczyński, David Wittkowski, Brian Wundheiler, Alexey Yushkov, Orazio Zapparrata, Enrique Zas, Danilo Zavrtanik, Marko Zavrtanik, Lukas Zehrer, Pierre Auger Collaboration. "Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory." The astrophysical journal 935(2) (2022) 170 (2022). doi:10.3847/1538