Searches for neutrinos in the direction of radio-bright blazars with the ANTARES telescope
Creators: name: ANTARES Collaboration
name: Albert, A.
name: Alves, S.
name: André, M.
name: Ardid, M.
name: Ardid, S.
name: Aubert, J. J.
name: Aublin, J
name: Baret, B.
name: Basa, S.
name: Becherini, Y.
name: Belhorma, B.
name: Bendahman, M.
name: Benfenati, F.
name: Bertin, V.
name: Biagi, S.
name: Bissinger, M.
name: Boumaaza, J.
name: Bouta, M.
name: Bouwhuis, M. C.
name: Brânzaş, H.
name: Bruijn, R.
name: Brunner, J.
name: Busto, J.
name: Caiffi, B.
name: Calvo, D.
name: Campion, S.
name: Capone, A.
name: Caramete, L.
name: Carenini, F.
name: Carr, J.
name: Carretero, V.
name: Celli, S.
name: Cerisy, L.
name: Chabab, M.
name: Moursli, R. Cherkaoui El
name: Chiarusi, T.
name: Circella, M.
name: Coelho, J. A. B.
name: Coleiro, A.
name: Coniglione, R.
name: Coyle, P.
name: Creusot, A.
name: Cruz, A. S. M.
name: Díaz, A. F.
name: De Martino, B.
name: Distefano, C.
name: Di Palma, I.
name: Domi, A.
name: Donzaud, C.
name: Dornic, D.
name: Drouhin, D.
name: Eberl, T.
name: van Eeden, T.
name: van Eijk, D.
name: Hedri, S. El
name: Khayati, N. El
name: Enzenhöfer, A.
name: Fermani, P.
name: Ferrara, G.
name: Filippini, F.
name: Fusco, L.
name: Gagliardini, S.
name: García, J.
name: Oliver, C. Gatius
name: Gay, P.
name: Geißelbrecht, N.
name: Glotin, H.
name: Gozzini, R.
name: Ruiz, R. Gracia
name: Graf, K.
name: Guidi, C.
name: Haegel, L.
name: Hallmann, S.
name: van Haren, H.
name: Heijboer, A. J.
name: Hello, Y.
name: Hernández-Rey, J. J.
name: Hößl, J.
name: Hofestädt, J.
name: Huang, F.
name: Illuminati, G.
name: James, C. W.
name: Jisse-Jung, B.
name: de Jong, M.
name: de Jong, P.
name: Kadler, M.
name: Kalekin, O.
name: Katz, U.
name: Kouchner, A.
name: Kovalev, Y. A
name: Kovalev, Y. Y
name: Kreykenbohm, I.
name: Kulikovskiy, V.
name: Lahmann, R.
name: Lamoureux, M.
name: Lazo, A.
name: Lefèvre, D.
name: Leonora, E.
name: Levi, G.
name: Stum, S. Le
name: Lopez-Coto, D.
name: Loucatos, S.
name: Maderer, L.
name: Manczak, J.
name: Marcelin, M.
name: Margiotta, A.
name: Marinelli, A.
name: Martínez-Mora, J. A.
name: Migliozzi, P.
name: Moussa, A.
name: Muller, R.
name: Navas, S.
name: Nezri, E.
name: Fearraigh, B. Ó
name: Oukacha, E.
name: Păun, A.
name: Păvălaş, G. E.
name: Peña-Martínez, S.
name: Perrin-Terrin, M.
name: Pestel, V.
name: Piattelli, P.
name: Plavin, A.
name: Poirè, C.
name: Popa, V.
name: Pradier, T.
name: Pushkarev, A.
name: Randazzo, N.
name: Real, D.
name: Reck, S.
name: Riccobene, G.
name: Romanov, A.
name: Sánchez-Losa, A.
name: Saina, A.
name: Greus, F. Salesa
name: Samtleben, D. F. E.
name: Sanguineti, M.
name: Sapienza, P.
name: Schnabel, J.
name: Schumann, J.
name: Schüssler, F.
name: Seneca, J.
name: Spurio, M.
name: Stolarczyk, Th.
name: Taiuti, M.
name: Tayalati, Y.
name: Tingay, S. J.
name: Troitsky, S.
name: Vallage, B.
name: Vannoye, G.
name: Van Elewyck, V.
name: Viola, S.
name: Vivolo, D.
name: Wilms, J.
name: Zavatarelli, S.
name: Zegarelli, A.
name: Zornoza, J. D.
name: Zúñiga, J.
name: Collaboration, OVRO
name: :
name: Hovatta, T.
name: Kiehlmann, S.
name: Liodakis, I.
name: Pavlidou, V.
name: Readhead, A. C. S
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Active galaxies, especially blazars, are among the most promising neutrino source candidates. To date, ANTARES searches for these objects considered GeV-TeV $γ$-ray bright blazars. Here, a statistically complete radio-bright blazar sample is used as the target for searches of origins of neutrinos collected by the ANTARES neutrino telescope over 13 years of operation. The hypothesis of a neutrino-blazar directional correlation is tested by pair counting and by a complementary likelihood-based approach. The resulting post-trial $p$-value is $3.0\%$ ($2.2σ$ in the two-sided convention), possibly indicating a correlation. Additionally, a time-dependent analysis is performed to search for temporal clustering of neutrino candidates as a mean of detecting neutrino flares in blazars. None of the investigated sources alone reaches a significant flare detection level. However, the presence of 18 sources with a pre-trial significance above $3σ$ indicates a $p=1.4\%$ ($2.5σ$ in the two-sided convention) detection of a time-variable neutrino flux. An \textit{a posteriori} investigation reveals an intriguing temporal coincidence of neutrino, radio, and $γ$-ray flares of the J0242+1101 blazar at a $p=0.5\%$ ($2.9σ$ in the two-sided convention) level. Altogether, the results presented here suggest a possible connection of neutrino candidates detected by the ANTARES telescope with radio-bright blazars.