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Aglietta, M.; Allekotte, I.; Andrada, B.; Asorey, H.; Bakalova, A.; Barbato, F.; Berat, C.; Bhatta, G.; Blazek, J.; Bonifazi, C.; Bonneau Arbeletche, L.; Brack, J.; Buchholz, P.; Canfora, F.; Caracas, I.; Castellina, A.; Cazon, L.; Cerda, M.; Conceição, R.; Consolati, G.; Correia dos Santos, D.; de Jong, S. J.; de Oliveira Franco, D.; de Palma, F.; De Vito, E.; Deval, L.; Dova, M. T.; Ebr, J.; Farmer, J.; Figueira, J. M.; Fitoussi, T.; Fujii, T.; Gesualdi, F.; Giaccari, U.; Glombitza, J.; Gollan, F.; Gómez Berisso, M.; Goos, I.; Guarino, F.; Guido, E.; Hampel, M. R.; Harari, D.; Isar, P. G.; Keilhauer, B.; Kleinfeller, J.; Knapp, F.; Kunka, N.; Lenok, V.; Letessier-Selvon, A.; Lo Presti, D.; Lopes, L.; López, R.; Lu, L.; Luce, Q.; Lundquist, J. P.; Mancarella, G.; Mandat, D.; Manning, B. C.; Mariani, F. M.; Marsella, G.; Martello, D.; Mathes, H. J.; Matthiae, G.; Mollerach, S.; Morello, C.; Muller, M. A.; Muzio, M.; Nasr-Esfahani, A.; Nicora, G.; Novotny, V.; Núñez, L. A.; Palatka, M.; Papenbreer, P.; Parra, A.; Pȩkala, J.; Peña-Rodriguez, J.; Pérez Bertolli, C.; Petrucci, C.; Pimenta, M.; Rautenberg, J.; Roncoroni, M. J.; Rovero, A. C.; Saharan, M.; Salazar, H.; Sarmento, R.; Schäfer, C. M.; Schovánek, P.; Schröder, F. G.; Smau, R.; Sommers, P.; Soriano, J. F.; Suárez-Durán, M.; Supanitsky, A. D.; Tapia, A.; Torrès, Z.; Travaini, A.; Ulrich, R.; Varela, E.; Wiencke, L.; Zavrtanik, M.
The Astrophysical journal, 08/2022, Letnik: 935, Številka: 2Journal Article
Abstract 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 ultra-high-energy cosmic rays above 32 EeV. We publish 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 3.4 π 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 4 σ significance level for cosmic-ray energies above ∼40 EeV.
