ANTARES offline study of three alerts after Baikal-GVD follow-up found coincident cascade neutrino events

Alves Garre, S.; Versari, F.; Avrorin, A. D.; Dzhlkibaev, Z. -A. M.; Shelepov, M. D.; Suvorova, O. V.; Albert, A.; Alves, S.; Andre, M.; Anghinolfi, M.; Anton, G.; Ardid, M.; Ardid, S.; Aubert, J. -J.; Aublin, J.; Baret, B.; Basa, S.; Belhorma, B.; Bendahman, M.; Bertin, V.; Biagi, S.; Bissinger, M.; Boumaaza, J.; Bouta, M.; Bouwhuis, M. C.; Branzas, H.; Bruijn, R.; Brunner, J.; Busto, J.; Caiffi, B.; Capone, A.; Caramete, L.; Carr, J.; Carretero, V.; Celli, S.; Chabab, M.; Chau, T. N.; El Moursli, R. C.; Chiarusi, T.; Circella, M.; Coleiro, A.; Colomer-Molla, M.; Coniglione, R.; Coyle, P.; Creusot, A.; Diaz, A. F.; De Wasseige, G.; Deschamps, A.; Distefano, C.; Di Palma, I.; Domi, A.; Donzaud, C.; Dornic, D.; Drouhin, D.; Eberl, T.; Van Eeden, T.; Van Eijk, D.; El Khayati, N.; Enzenhofer, A.; Fermani, P.; Ferrara, G.; Filippini, F.; Fusco, L. A.; Gatelet, Y.; Gay, P.; Glotin, H.; Gozzini, R.; Gracia Ruiz, R.; Graf, K.; Guidi, C.; Hallmann, S.; Van Haren, H.; Heijboer, A. J.; Hello, Y.; Hernandez-Rey, J. J.; Hossl, J.; Hofestadt, J.; Huang, F.; Illuminati, G.; James, C. W.; Jisse-Jung, B.; De Jong, M.; De Jong, P.; Kadler, M.; Kalekin, O.; Katz, U.; Khan-Chowdhury, N. R.; Kouchner, A.; Kreykenbohm, I.; Kulikovskiy, V.; Lahmann, R.; Le Breton, R.; Lefevre, D.; Leonora, E.; Levi, G.; Lincetto, M.; Lopez-Coto, D.; Loucatos, S.; Maderer, L.; Manczak, J.; Marcelin, M.; Margiotta, A.; Marinelli, A.; Martinez-Mora, J. A.; Melis, K.; Migliozzi, P.; Moussa, A.; Muller, R.; Nauta, L.; Navas, S.; Nezri, E.; O'Fearraigh, B.; Paun, A.; Pavalas, G. E.; Pellegrino, C.; Perrin-Terrin, M.; Pestel, V.; Piattelli, P.; Pieterse, C.; Poire, C.; Popa, V.; Pradier, T.; Randazzo, N.; Reck, S.; Riccobene, G.; Romanov, A.; Sanchez-Losa, A.; Salesa Greus, F.; Samtleben, D. F. E.; Sanguineti, M.; Sapienza, P.; Schnabel, J.; Schumann, J.; Schussler, F.; Spurio, M.; Stolarczyk, Th.; Taiuti, M.; Tayalati, Y.; Tingay, S. J.; Vallage, B.; Van Elewyck, V.; Versari, F.; Viola, S.; Vivolo, D.; Wilms, J.; Zavatarelli, S.; Zegarelli, A.; Zornoza, J. D.; Zuniga, J.; Allakhverdyan, V. A.; Avrorin, A. D.; Avrorin, A. V.; Aynutdinov, V. M.; Bannasch, R.; Bardacova, Z.; Belolaptikov, I. A.; Borina, I. V.; Brudanin, V. B.; Budnev, N. M.; Dik, V. Y.; Domogatsky, G. V.; Doroshenko, A. A.; Dvornicky, R.; Dyachok, A. N.; Dzhilkibaev, Zh. -A. M.; Eckerova, E.; Elzhov, T. V.; Fajt, L.; Fialkovski, S. V.; Gafarov, A. R.; Golubkov, K. V.; Gorshkov, N. S.; Gress, T. I.; Katulin, M. S.; Kebkal, K. G.; Kebkal, O. G.; Khramov, E. V.; Kolbin, M. M.; Konischev, K. V.; Kopanski, K. A.; Korobchenko, A. V.; Koshechkin, A. P.; Kozhin, V. A.; Kruglov, M. V.; Kryukov, M. K.; Kulepov, V. F.; Malecki, Pa.; Malyshkin, Y. M.; Milenin, M. B.; Mirgazov, R. R.; Naumov, D. V.; Nazari, V.; Noga, W.; Petukhov, D. P.; Pliskovsky, E. N.; Rozanov, M. I.; Rushay, V. D.; Ryabov, E. V.; Safronov, G. B.; Shaybonov, B. A.; Shelepov, M. D.; Simkovic, F.; Sirenko, A. E.; Skurikhin, A. V.; Solovjev, A. G.; Sorokovikov, M. N.; Stekl, I.; Stromakov, A. P.; Sushenok, E. O.; Suvorova, O. V.; Tabolenko, V. A.; Tarashansky, B. A.; Yablokova, Y. V.; Yakovlev, S. A.; Zaborov, D. N.

ANTARES and Baikal-GVD are both Cherenkov neutrino telescopes located in the Northern Hemisphere so their fields of view almost overlap allowing for a combined study of the sky. ANTARES sends alerts after a fast online analysis based on energy and reconstruction direction of track-like events. From December of 2018 until the beginning of 2021, Baikal-GVD received 38 ANTARES alerts, and followed up 32. No coincidence was found. However, a search of the Baikal-GVD cascade sample showed some events falling within an angular distance of less than 5° for three of the ANTARES alerts in a time span of 48 hours. A dedicated offline analysis based on the full ANTARES data sample has been started to search for additional coincident tracks and cascades at a 3σ significance. In this work we present the final results of the offline analysis of the three ANTARES alerts: limits on the astrophysical neutrino fluence are reported.

ANTARES offline study of three alerts after Baikal-GVD follow-up found coincident cascade neutrino events

Alves Garre S.;Versari F.;Avrorin A. D.;Dzhlkibaev Z. -A. M.;Shelepov M. D.;Suvorova O. V.;Albert A.;Alves S.;Andre M.;Anghinolfi M.;Anton G.;Ardid M.;Ardid S.;Aubert J. -J.;Aublin J.;Baret B.;Basa S.;Belhorma B.;Bendahman M.;Bertin V.;Biagi S.;Bissinger M.;Boumaaza J.;Bouta M.;Bouwhuis M. C.;Branzas H.;Bruijn R.;Brunner J.;Busto J.;Caiffi B.;Capone A.;Caramete L.;Carr J.;Carretero V.;Celli S.;Chabab M.;Chau T. N.;El Moursli R. C.;Chiarusi T.;Circella M.;Coleiro A.;Colomer-Molla M.;Coniglione R.;Coyle P.;Creusot A.;Diaz A. F.;de Wasseige G.;Deschamps A.;Distefano C.;Di Palma I.;Domi A.;Donzaud C.;Dornic D.;Drouhin D.;Eberl T.;van Eeden T.;van Eijk D.;El Khayati N.;Enzenhofer A.;Fermani P.;Ferrara G.;Filippini F.;Fusco L. A.;Gatelet Y.;Gay P.;Glotin H.;Gozzini R.;Gracia Ruiz R.;Graf K.;Guidi C.;Hallmann S.;van Haren H.;Heijboer A. J.;Hello Y.;Hernandez-Rey J. J.;Hossl J.;Hofestadt J.;Huang F.;Illuminati G.;James C. W.;Jisse-Jung B.;de Jong M.;de Jong P.;Kadler M.;Kalekin O.;Katz U.;Khan-Chowdhury N. R.;Kouchner A.;Kreykenbohm I.;Kulikovskiy V.;Lahmann R.;Le Breton R.;Lefevre D.;Leonora E.;Levi G.;Lincetto M.;Lopez-Coto D.;Loucatos S.;Maderer L.;Manczak J.;Marcelin M.;Margiotta A.;Marinelli A.;Martinez-Mora J. A.;Melis K.;Migliozzi P.;Moussa A.;Muller R.;Nauta L.;Navas S.;Nezri E.;O'Fearraigh B.;Paun A.;Pavalas G. E.;Pellegrino C.;Perrin-Terrin M.;Pestel V.;Piattelli P.;Pieterse C.;Poire C.;Popa V.;Pradier T.;Randazzo N.;Reck S.;Riccobene G.;Romanov A.;Sanchez-Losa A.;Salesa Greus F.;Samtleben D. F. E.;Sanguineti M.;Sapienza P.;Schnabel J.;Schumann J.;Schussler F.;Spurio M.;Stolarczyk Th.;Taiuti M.;Tayalati Y.;Tingay S. J.;Vallage B.;Van Elewyck V.;Versari F.;Viola S.;Vivolo D.;Wilms J.;Zavatarelli S.;Zegarelli A.;Zornoza J. D.;Zuniga J.;Allakhverdyan V. A.;Avrorin A. D.;Avrorin A. V.;Aynutdinov V. M.;Bannasch R.;Bardacova Z.;Belolaptikov I. A.;Borina I. V.;Brudanin V. B.;Budnev N. M.;Dik V. Y.;Domogatsky G. V.;Doroshenko A. A.;Dvornicky R.;Dyachok A. N.;Dzhilkibaev Zh. -A. M.;Eckerova E.;Elzhov T. V.;Fajt L.;Fialkovski S. V.;Gafarov A. R.;Golubkov K. V.;Gorshkov N. S.;Gress T. I.;Katulin M. S.;Kebkal K. G.;Kebkal O. G.;Khramov E. V.;Kolbin M. M.;Konischev K. V.;Kopanski K. A.;Korobchenko A. V.;Koshechkin A. P.;Kozhin V. A.;Kruglov M. V.;Kryukov M. K.;Kulepov V. F.;Malecki Pa.;Malyshkin Y. M.;Milenin M. B.;Mirgazov R. R.;Naumov D. V.;Nazari V.;Noga W.;Petukhov D. P.;Pliskovsky E. N.;Rozanov M. I.;Rushay V. D.;Ryabov E. V.;Safronov G. B.;Shaybonov B. A.;Shelepov M. D.;Simkovic F.;Sirenko A. E.;Skurikhin A. V.;Solovjev A. G.;Sorokovikov M. N.;Stekl I.;Stromakov A. P.;Sushenok E. O.;Suvorova O. V.;Tabolenko V. A.;Tarashansky B. A.;Yablokova Y. V.;Yakovlev S. A.;Zaborov D. N.

2022

Abstract

ANTARES and Baikal-GVD are both Cherenkov neutrino telescopes located in the Northern Hemisphere so their fields of view almost overlap allowing for a combined study of the sky. ANTARES sends alerts after a fast online analysis based on energy and reconstruction direction of track-like events. From December of 2018 until the beginning of 2021, Baikal-GVD received 38 ANTARES alerts, and followed up 32. No coincidence was found. However, a search of the Baikal-GVD cascade sample showed some events falling within an angular distance of less than 5° for three of the ANTARES alerts in a time span of 48 hours. A dedicated offline analysis based on the full ANTARES data sample has been started to search for additional coincident tracks and cascades at a 3σ significance. In this work we present the final results of the offline analysis of the three ANTARES alerts: limits on the astrophysical neutrino fluence are reported.