The cosmic ray shadow of the Moon observed with the ANTARES neutrino telescope

A. Albert (1) , M. André , M. Anghinolfi , G. Anton , M. Ardid , J.-J. Aubert (2) , J. Aublin (3) , T. Avgitas (3) , B. Baret (3) , J. Barrios-Martí , S. Basa (4) , B. Belhorma , V. Bertin (2) , S. Biagi , R. Bormuth , J. Boumaaza , S. Bourret (3) , M.C. Bouwhuis , H. Brânzaş , R. Bruijn , J. Brunner (2) , J. Busto (2) , A. Capone , L. Caramete , J. Carr (2) , S. Celli , M. Chabab , R. Cherkaoui El Moursli , T. Chiarusi , M. Circella , J.A.B. Coelho (3) , A. Coleiro (3) , M. Colomer (3) , R. Coniglione , H. Costantini (2) , P. Coyle (2) , A. Creusot (3) , A.F. Díaz , Anne Deschamps (5) , C. Distefano , I. Di Palma , A. Domi , C. Donzaud (3, 6) , D. Dornic (2) , D. Drouhin (1) , T. Eberl , I. El Bojaddaini , N. El Khayati , D. Elsässer , A. Enzenhöfer (2) , A. Ettahiri , F. Fassi , I. Felis , P. Fermani , G. Ferrara , L. Fusco (3) , P. Gay (3, 7) , H. Glotin (8) , T. Grégoire (3) , R. Gracia Ruiz (1) , K. Graf , S. Hallmann , H. van Haren , A.J. Heijboer , Y. Hello (5) , J.J. Hernández-Rey , J. Hössl , J. Hofestädt , G. Illuminati , M. de Jong , M. Jongen , M. Kadler , O. Kalekin , U. Katz , N.R. Khan-Chowdhury , A. Kouchner (3, 9) , M. Kreter , I. Kreykenbohm , V. Kulikovskiy , C. Lachaud (3) , R. Lahmann , D. Lefèvre (10) , E. Leonora , G. Levi , M. Lotze , S. Loucatos , M. Marcelin (4) , A. Margiotta , A. Marinelli , J.A. Martínez-Mora , R. Mele , K. Melis , P. Migliozzi , A. Moussa , S. Navas , E. Nezri (4) , A. Nuñez (2, 4) , M. Organokov (1) , G.E. Păvălaş , C. Pellegrino , P. Piattelli , V. Popa , T. Pradier (1) , L. Quinn (2) , C. Racca (11) , N. Randazzo , G. Riccobene , A. Sánchez-Losa , M. Saldaña , I. Salvadori (2) , D.F.E. Samtleben , M. Sanguineti , P. Sapienza , F. Schüssler , M. Spurio , Th. Stolarczyk , M. Taiuti , Y. Tayalati , A. Trovato , B. Vallage , V. van Elewyck (3, 9) , F. Versari , D. Vivolo , J. Wilms , D. Zaborov (2) , J.D. Zornoza , J. Zúñiga

1 IPHC - Institut Pluridisciplinaire Hubert Curien
2 CPPM - Centre de Physique des Particules de Marseille
3 APC (UMR_7164) - AstroParticule et Cosmologie
4 LAM - Laboratoire d'Astrophysique de Marseille
5 GEOAZUR 7329 - Géoazur
6 UP11 - Université Paris-Sud - Paris 11
7 LPC - Laboratoire de Physique de Clermont
8 LIS - Laboratoire d'Informatique et des Systèmes (LIS) (Marseille, Toulon)
9 IUF - Institut universitaire de France
10 MIO - Institut méditerranéen d'océanologie
11 GRPHE - Groupe de Recherche en Physique des Hautes Energies

One of the main objectives of the ANTARES telescope is the search for point-like neutrino sources. Both the pointing accuracy and the angular resolution of the detector are important in this context and a reliable way to evaluate this performance is needed. In order to measure the pointing accuracy of the detector, one possibility is to study the shadow of the Moon, i.e. the deficit of the atmospheric muon flux from the direction of the Moon induced by the absorption of cosmic rays. Analysing the data taken between 2007 and 2016, the Moon shadow is observed with $3.5\sigma $ statistical significance. The detector angular resolution for downward-going muons is $0.73^{\circ }\pm 0.14^{\circ }.$ The resulting pointing performance is consistent with the expectations. An independent check of the telescope pointing accuracy is realised with the data collected by a shower array detector onboard of a ship temporarily moving around the ANTARES location.

Mots clés: neutrino: detector; shadowing: lunar; cosmic radiation: absorption; muon: atmosphere; muon: flux; ANTARES; angular resolution; performance; statistical; showers

Domaines: Astrophysique [astro-ph]; Instrumentations et Détecteurs [physics.ins-det]; Physique des Hautes Energies - Expérience [hep-ex]

A. Albert, M. André, M. Anghinolfi, G. Anton, M. Ardid, et al.. The cosmic ray shadow of the Moon observed with the ANTARES neutrino telescope. European Physical Journal C: Particles and Fields, 2018, 78 (12), pp.1006. ⟨10.1140/epjc/s10052-018-6451-3⟩. ⟨hal-03171481⟩