Search for directional associations between baikal gigaton volume detector neutrino-induced cascades and high-energy astrophysical sources
Allakhverdyan V.A. Avrorin A.D. Avrorin A.V. Aynutdinov V.M. Bardacová Z. Belolaptikov I.A. Bondarev E.A. Borina I.V. Budnev N.M. Chepurnov A.S. Dik V.Y. Domogatsky G.V. Doroshenko A.A. Dvornický R. Dyachok A.N. Dzhilkibaev Z.-A.M. Eckerová E. Elzhov T.V. Fajt L. Gafarov A.R. Golubkov K.V. Gorshkov N.S. Gress T.I. Kebkal K.G. Kharuk I. Khramov E.V. Kolbin M.M. Konischev K.V. Korobchenko A.V. Koshechkin A.P. Kozhin V.A. Kruglov M.V. Kulepov V.F. Lemeshev Y.E. Milenin M.B. Mirgazov R.R. Naumov D.V. Nikolaev A.S. Petukhov D.P. Pliskovsky E.N. Rozanov M.I. Ryabov E.V. Safronov G.B. Seitova D. Shaybonov B.A. Shelepov M.D. Shilkin S.D. Shirokov E.V. Šimkovic F. Sirenko A.E. Skurikhin A.V. Solovjev A.G. Sorokovikov M.N. Štekl I. Stromakov A.P. Suvorova O.V. Tabolenko V.A. Ulzutuev B.B. Yablokova Y.V. Zaborov D.N. Zavyalov S.I. Zvezdov D.Y. Kosogorov N.A. Kovalev Y.Y. Lipunova G.V. Plavin A.V. Semikoz D.V. Troitsky S.V.
1 November 2023Oxford University Press
Monthly Notices of the Royal Astronomical Society
2023#526Issue 1942 - 951 pp.
Baikal-GVD has recently published its first measurement of the diffuse astrophysical neutrino flux, performed using high-energy cascade-like events. We further explore the Baikal-GVD cascade data set collected in 2018-2022, with the aim to identify possible associations between the Baikal-GVD neutrinos and known astrophysical sources. We leverage the relatively high angular resolution of the Baikal-GVD neutrino telescope (2-3 deg.), made possible by the use of liquid water as the detection medium, enabling the study of astrophysical point sources even with cascade events. We estimate the telescopes sensitivity in the cascade channel for high-energy astrophysical sources and refine our analysis prescriptions using Monte-Carlo simulations. We primarily focus on cascades with energies exceeding 100 TeV, which we employ to search for correlation with radio-bright blazars. Although the currently limited neutrino sample size provides no statistically significant effects, our analysis suggests a number of possible associations with both extragalactic and Galactic sources. Specifically, we present an analysis of an observed triplet of neutrino candidate events in the Galactic plane, focusing on its potential connection with certain Galactic sources, and discuss the coincidence of cascades with several bright and flaring blazars.
binaries: general , galaxies: active , neutrinos , quasars: general , radio continuum: galaxies
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Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
Institute for Nuclear Research, Russian Academy of Sciences, 60th October Anniversary Prospect 7a, Moscow, 117312, Russian Federation
Comenius University, Bratislava, 81499, Slovakia
Czech Technical University in Prague, Institute of Experimental and Applied Physics, Prague, 11000, Czech Republic
Irkutsk State University, Irkutsk, 664003, Russian Federation
Skobeltsyn Research Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, 119991, Russian Federation
Institute of Nuclear Physics Me Rk, Almaty, 050032, Kazakhstan
Ao LATENA (Joint Stock Company), St Petersburg, 199106, Russian Federation
Nizhny Novgorod State Technical University, Nizhny Novgorod, 603950, Russian Federation
St. Petersburg State Marine Technical University, St Petersburg, 190008, Russian Federation
Astro Space Center of Lebedev Physical Institute, Profsoyuznaya 84/32, Moscow, 117997, Russian Federation
Moscow Institute of Physics and Technology, Institutsky per. 9, Dolgoprudny, 141700, Russian Federation
Cahill Center for Astronomy and Astrophysics, Mc 249-17, Institute of Technology, Pasadena, 91125, CA, United States
Max-Planck-Institut fur ¨ Radioastronomie, Auf dem Hugel ¨ 69, Bonn, D-53121, Germany
Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetskii pr. 13, Moscow, 119234, Russian Federation
Apc, Université Paris Diderot, Cnrs, IN2P3, Cea, Irfu, Sorbonne Paris Cite 119, Paris, F-75205, France
Physics Department, Lomonosov Moscow State University, 1-2 Leninskie Gory, Moscow, 119991, Russian Federation
Joint Institute for Nuclear Research
Institute for Nuclear Research
Comenius University
Czech Technical University in Prague
Irkutsk State University
Skobeltsyn Research Institute of Nuclear Physics
Institute of Nuclear Physics Me Rk
Ao LATENA (Joint Stock Company)
Nizhny Novgorod State Technical University
St. Petersburg State Marine Technical University
Astro Space Center of Lebedev Physical Institute
Moscow Institute of Physics and Technology
Cahill Center for Astronomy and Astrophysics
Max-Planck-Institut fur ¨ Radioastronomie
Sternberg Astronomical Institute
Apc
Physics Department
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