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First observation of the cosmic ray shadow of the Moon and the Sun with KM3NeT/ORCA

2023; Springer Science+Business Media; Volume: 83; Issue: 4 Linguagem: Inglês

10.1140/epjc/s10052-023-11401-5

1434-6052

S. Aiello, A. Albert, S. Alves Garre, Z. Aly, Antonio Ambrosone, F. Ameli, M. André, M. Anghinolfi, M. Anguita, M. Ardid, Salva Ardid, J. Aublin, C. Bagatelas, L. Bailly-Salins, B. Baret, S. Başeğmez du Pree, Y. Becherini, M. Bendahman, F. Benfenati, E. Berbee, V. Bertín, S. Biagi, M. Boettcher, M. Bou-Cabo, J. Boumaaza, M. Bouta, M.C. Bouwhuis, C. Bozza, H. Brânzaş, R. Bruijn, J. Brünner, Riccardo Bruno, E. Buis, R. Buompane, J. Busto, B. Caiffi, D. Calvo, S. Campion, A. Capone, F. Carenini, V. Carretero, Paolo Castaldi, S. Celli, L. Cerisy, M. Chabab, Thien Nhan Chau, A. Chen, R. Cherkaoui El Moursli, S. Cherubini, V. Chiarella, T. Chiarusi, M. Circella, R. Cocimano, J. A. B. Coelho, A. Coleiro, R. Coniglione, P. Coyle, A. Creusot, A. Cruz, G. Cuttone, R. Dallier, Y. Darras, A. De Benedittis, B. De Martino, R. Del Burgo, I. Di Palma, A. F. Díaz, D. Diego-Tortosa, C. Distefano, Alba Domi, C. Donzaud, D. Dornic, M. Dörr, E. Drakopoulou, D. Drouhin, T. Eberl, A. Eddyamoui, T. van Eeden, M. Eff, D. van Eijk, I. El Bojaddaini, S. El Hedri, A. Enzenhöfer, V. Espinosa, G. Ferrara, M. D. Filipović, F. Filippini, L. Fusco, J. Gabriel, T. Gal, J. García Méndez, Alfonso Garcia, F. Garufi, C. Gatius Oliver, N. Geißelbrecht, L. Gialanella, Emidio Giorgio, A. Girardi, I. Goos, Sara Rebecca Gozzini, R. Gracía, K. Graf, D. Guderian, C. Guidi, B. Guillon, M. Gutiérrez, L. Haegel, Hans van Haren, A. Heijboer, A. Hekalo, L. Hennig, J.J. Hernandez, F. Huang, W. Idrissi Ibnsalih, G. Illuminati, C. James, Davit Janezashvili, M. de Jong, P. de Jong, B. J. Jung, P. Kalaczyński, O. Kalekin, U. Katz, Nafis Rezwan Khan Chowdhury, G. Kistauri, F. van der Knaap, P. Kooijman, A. Kouchner, V. Kulikovskiy, M. Labalme, R. Lahmann, A. Lakhal, M. Lamoureux, G. Larosa, C. Lastoria, A. Lazo, R. Le Breton, S. Le Stum, G. Lehaut, E. Leonora, N. Lessing, G. Lévi, S. Liang, M. Lindsey Clark, F. Longhitano, L. Maderer, Jhilik Majumdar, J. Mańczak, A. Margiotta, A. Marinelli, C. Markou, L. Martin, J. A. Martínez-Mora, A. Martini, Fabio Marzaioli, Massimo Mastrodicasa, S. Mastroianni, Karel Melis, S. Miccichè, G. Miele, P. Migliozzi, E. Migneco, P. Mijakowski, C.M. Mollo, L. Morales-Gallegos, C. Morley-Wong, A. Moussa, R. Müller, M. R. Musone, M. Musumeci, L. Nauta, S. Navas, C. A. Nicolau, B. Nkosi, B. Ó Fearraigh, A. Orlando, E. Oukacha, J. Palacios González, Gogita Papalashvili, R. Papaleo, E.J. Pastor Gomez, A. M. Păun, G. E. Păvălaş, C. Pellegrino, S. Peña Martínez, M. Perrin‐Terrin, J. Perronnel, V. Pestel, P. Piattelli, O. Pisanti, C. Poirè, V. Popa, T. Pradier, Sara Pulvirenti, G. Qúeḿener, U. Rahaman, N. Randazzo, S. Razzaque, I. C. Rea, D. Real, S. Reck, G. Riccobene, J. E. M. Robinson, A. Romanov, F. Salesa Greus, D. F. E. Samtleben, A. Sánchez‐Losa, M. Sanguineti, C. Santonastaso, D. Santonocito, P. Sapienza, A. Sathe, J. Schnabel, M. F. Schneider, J. Schumann, Hester Schutte, J. Seneca, I. Sgura, R. Shanidze, Ankur Sharma, A. Simonelli, A. Sinopoulou, Mikhail Smirnov, B. Spisso, M. Spurio, D. Stavropoulos, S. M. Stellacci, M. Taiuti, K. Tavzarashvili, Y. Tayalati, H. Tedjditi, Hannes Thiersen, S. Tsagkli, V. Tsourapis, E. Tzamariudaki, V. Van Elewyck, G. Vannoye, G. Vasileiadis, F. Versari, S. Viola, D. Vivolo, H. Warnhofer, J. Wilms, E. de Wolf, H. Yepes, Tarik Yousfi, S. Zavatarelli, A. Zegarelli, Daniele Zito, J. D. Zornoza, J. Zúñiga, N. Zywucka,

Atmospheric Ozone and Climate

Abstract This article reports the first observation of the Moon and the Sun shadows in the sky distribution of cosmic-ray induced muons measured by the KM3NeT/ORCA detector. The analysed data-taking period spans from February 2020 to November 2021, when the detector had 6 Detection Units deployed at the bottom of the Mediterranean Sea, each composed of 18 Digital Optical Modules. The shadows induced by the Moon and the Sun were detected at their nominal position with a statistical significance of 4.2 $$\sigma $$ σ and 6.2 $$\sigma $$ σ , and an angular resolution of $$\sigma _{res}=0.49^\circ $$ σ res = 0 . 49 ∘ and $$\sigma _{res}=0.66^\circ $$ σ res = 0 . 66 ∘ , respectively, consistent with the prediction of $$0.53^\circ $$ 0 . 53 ∘ from simulations. This early result confirms the effectiveness of the detector calibration, in time, position and orientation and the accuracy of the event direction reconstruction. This also demonstrates the performance and the competitiveness of the detector in terms of pointing accuracy and angular resolution.