Update on the intermediate arrival-direction analyses of the Pierre Auger Observatory
The Pierre Auger Collaboration,
A. Abdul Halim,
P. Abreu,
M. Aglietta,
I. Allekotte,
K. Almeida Cheminant,
A. Almela, R. Aloisio, J. Alvarez-Muñiz, A. Ambrosone, J. Ammerman Yebra, G.A. Anastasi, L.A. Anchordoqui, B. Andrada, L. Andrade Dourado, S. Andringa, L. Apollonio*, C. Aramo, E. Arnone, J.C. Arteaga Velazquez, P. Assis, G. Avila, E. Avocone, A. Bakalova, F. Barbato, A. Bartz Mocellin, J.A. Bellido, C. Berat, M.E. Bertaina, M. Bianciotto, P.L. Biermann, V. Binet, K. Bismark, T. Bister, J. Biteau, J. Blazek, J. Blümer, M. Bohacova, D. Boncioli, C. Bonifazi, L. Bonneau Arbeletche, N. Borodai, J. Brack, P.G. Brichetto Orchera, F.L. Briechle, A. Bueno, S. Buitink, M. Buscemi, M. Büsken, A. Bwembya, K.S. Caballero-Mora, S. Cabana-Freire, L. Caccianiga, F. Campuzano, J. Caraça-Valente, R. Caruso, A. Castellina, F. Catalani, G. Cataldi, L. Cazon, M. Cerda, B. Čermáková, A. Cermenati, J.A. Chinellato, J. Chudoba, L. Chytka, R.W. Clay, A. Cobos Cerutti, R. Colalillo, R. Conceição, G. Consolati, M. Conte, F. Convenga, D. Correia dos Santos, P.J. Costa, C. Covault, M. Cristinziani, C.S. Cruz Sanchez, S. Dasso, K. Daumiller, B.R. Dawson, R.M. de Almeida, E.T. de Boone, B. de Errico, J. de Jesús, S.J. de Jong, J. de Mello Neto, I. De Mitri, J. de Oliveira, D. de Oliveira Franco, F. de Palma, V. de Souza, E. De Vito, A. Del Popolo, O. Deligny, N. Denner, L. Deval, A. di Matteo, C. Dobrigkeit, J.C. D'Olivo, L.M. Domingues Mendes, Q. Dorosti, J. dos Anjos, R.C. dos Anjos, J. Ebr, F.H. Ellwanger, R. Engel, I. Epicoco, M. Erdmann, A. Etchegoyen, C. Evoli, H. Falcke, G.R. Farrar, A. Fauth, T. Fehler, F. Feldbusch, A. Fernandes, M. Fernandez, B. Fick, J.M. Figueira, P. Filip, A. Filipcic, T. Fitoussi, B. Flaggs, T. Fodran, A. Franco, M. Freitas, T. Fujii, A. Fuster, C. Galea, B. Garcia, C. Gaudu, P.L. Ghia, U. Giaccari, F. Gobbi, F. Gollan, G. Golup, M. Gómez Berisso, P.F. Gómez Vitale, J.P. Gongora, J.M. Gonzalez, N.M. Gonzalez, D. Gora, A. Gorgi, M. Gottowik, F. Guarino, G. Guedes, L. Gülzow, S. Hahn, P. Hamal, M.R. Hampel, P.M. Hansen, V.M. Harvey, A. Haungs, T. Hebbeker, C. Hojvat, J. Hörandel, P. Horvath, M. Hrabovsky, T. Huege, A. Insolia, P.G. Isar, M. Ismaiel, P. Janecek, V. Jilek, K.H. Kampert, B. Keilhauer, A. Khakurdikar, V.V. Kizakke Covilakam, H. Klages, M. Kleifges, J. Köhler, F. Krieger, M. Kubatova, N. Kunka, B.L. Lago, N. Langner, N. Leal, M.A. Leigui de Oliveira, Y. Lema-Capeans, A. Letessier-Selvon, I. Lhenry-Yvon, L. Lopes, J.P. Lundquist, M. Mallamaci, D. Mandat, P. Mantsch, F.M. Mariani, A. Mariazzi, I.C. Maris, G. Marsella, D. Martello, S. Martinelli, M.A. Martins, H.J. Mathes, J. Matthews, G. Matthiae, E.W. Mayotte, S. Mayotte, P. Mazur, G. Medina-Tanco, J. Meinert, D. Melo, A. Menshikov, C. Merx, S. Michal, M.I. Micheletti, L. Miramonti, M. Mogarkar, S. Mollerach, F. Montanet, L. Morejon, K. Mulrey, R. Mussa, W.M. Namasaka, S. Negi, L. Nellen, K. Nguyen, G. Nicora, M. Niechciol, D. Nitz, D. Nosek, A. Novikov, V. Novotný, L. Nozka, A. Nucita, L.A. Nunez, J. Ochoa, C. Oliveira, L. Östman, M. Palatka, J. Pallotta, S. Panja, G. Parente, T. Paulsen, J. Pawlowsky, M. Pech, J. Pękala, R. Pelayo, V. Pelgrims, L.A. Pereira, E.E. Pereira Martins, C. Pérez Bertolli, L. Perrone, S. Petrera, C. Petrucci, T. Pierog, M. Pimenta, M. Platino, B. Pont, M. Pourmohammad Shahvar, P. Privitera, C. Priyadarshi, M. Prouza, K. Pytel, S. Querchfeld, J. Rautenberg, D. Ravignani, J.V. Reginatto Akim, A. Reuzki, J. Ridky, F. Riehn, M. Risse, V. Rizi, E. Rodriguez, G. Rodriguez Fernandez, J.R. Rodriguez Rojo, S. Rossoni, M. Roth, E. Roulet, A. Rovero, A. Saftoiu, M. Saharan, F. Salamida, H.I. Salazar, G. Salina, P. Sampathkumar, N. San Martin, J. Sanabria Gomez, F.A. Sánchez, E.M. Santos, E. Santos, F. Sarazin, R. Sarmento, R. Sato, P. Savina, V. Scherini, H. Schieler, M. Schimassek, M. Schimp, D. Schmidt, O. Scholten, H. Schoorlemmer, P. Schovanek, F.G. Schröder, J. Schulte, T. Schulz, S.J. Sciutto, M. Scornavacche, A. Sedoski, A. Segreto, S. Sehgal, S.U. Shivashankara, G. Sigl, K. Simkova, F. Simon, R. Smida, P. Sommers, R. Squartini, M. Stadelmaier, S. Stanič, J. Stasielak, P. Stassi, S. Strähnz, M. Straub, T. Suomijarvi, A.D. Supanitsky, Z. Svozilikova, K. Syrokvas, Z. Szadkowski, F. Tairli, M. Tambone, A. Tapia, C. Taricco, C. Timmermans, O. Tkachenko, P. Tobiska, C.J. Todero Peixoto, B. Tomé, A. Travaini, P. Travnicek, M.J. Tueros, M. Unger, R. Uzeiroska, L. Vaclavek, M. Vacula, I. Vaiman, J.F. Valdés Galicia, L. Valore, P. van Dillen, E. Varela, V. Vašíčková, A. Vásquez-Ramírez, D. Veberic, I.D. Vergara Quispe, S. Verpoest, V. Verzi, J. Vicha, J. Vink, S. Vorobiov, J.B. Vuta, C.K.O. Watanabe, A. Watson, A. Weindl, M. Weitz, L. Wiencke, H. Wilczyński, B. Wundheiler, B. Yue, A. Yushkov, E. Zas, D. Zavrtanik and M. Zavrtaniket al. (click to show)*: corresponding author
Pre-published on:
September 23, 2025
Published on:
December 30, 2025
Abstract
We present an update on the arrival-direction analyses conducted on intermediate angular scales
using the complete Phase I data of the Pierre Auger Observatory up to the end of 2022 with a
total exposure of $135{,}000\,\text{km}^2\,\text{sr}\,\text{yr}$. We show the arrival-direction distribution of the ultra-high-
energy cosmic rays along the supergalactic plane above $20\,\text{EeV}$, and an update in the search for
magnetically-induced signatures in the arrival directions.
Furthermore, we present the potential of introducing estimators for the rigidity ordering of the events to enhance arrival-direction analyses
on small to intermediate angular scales. To achieve this, we take advantage of two estimators
working on the response of the surface detector: an analytical fit based on air-shower universality
and a deep neural network.
DOI: https://doi.org/10.22323/1.501.0177
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