Search for directional associations between Baikal Gigaton Volume Detector neutrino-induced cascades and high-energy astrophysical sources

Allakhverdyan, V.A.; Bondarev, E.A.; Chepurnov, A.S.; Dik, V.Y.; Doroshenko, A.A.; Dyachok, A.N.; Dzhilkibaev, Z.M.; Gafarov, A.R.; Golubkov, K.V.; Gorshkov, N.S.; Gress, T.I.; Kebkal, K.G.; Khramov, E.V.; Kolbin, M.M.; Konischev, K.V.; Korobchenko, A.V.; Kozhin, V.A.; Kruglov, M.V.; Lemeshev, Y.E.; Milenin, M.B.; Naumov, D.V.; Nikolaev, A.S.; Petukhov, D.P.; Rozanov, M.I.; Ryabov, E.V.; Safronov, G.B.; Seitova, D.; Shelepov, M.D.; Shilkin, S.D.; Shirokov, E.V.; Sirenko, A.E.; Skurikhin, A.V.; Solovjev, A.G.; Sorokovikov, M.N.; Suvorova, O.V.; Tabolenko, V.A.; Yablokova, Y.V.; Zaborov, D.N.; Zavyalov, S.I.; Kosogorov, N.A.; Kovalev, Y.Y.; Lipunova, G.V.; Troitsky, S.V.; Baikal-GVD, C.

Авторы: Allakhverdyan V.A., Bondarev E.A., Chepurnov A.S., Dik V.Y., Doroshenko A.A., Dyachok A.N., Dzhilkibaev Zh-A M., Gafarov A.R., Golubkov K.V., Gorshkov N.S., Gress T.I., Kebkal K.G., Khramov E.V., Kolbin M.M., Konischev K.V., Korobchenko A.V., Kozhin V.A., Kruglov M.V., Lemeshev Y.E., Milenin M.B., Naumov D.V., Nikolaev A.S., Petukhov D.P., Rozanov M.I., Ryabov E.V., Safronov G.B., Seitova D., Shelepov M.D., Shilkin S.D., Shirokov E.V., Sirenko A.E., Skurikhin A.V., Solovjev A.G., Sorokovikov M.N., Suvorova O.V., Tabolenko V.A., Yablokova Y.V., Zaborov D.N., Zavyalov S.I., Kosogorov N.A., Kovalev Y.Y., Lipunova G.V., Troitsky S.V., Baikal-GVD Collaboration
Журнал: Monthly Notices of the Royal Astronomical Society
Том: 526
Год издания: 2023
Издательство: Oxford Journals, Oxford University Press
Местоположение издательства: Oxford, UK, England
Первая страница: 942
Последняя страница: 951
DOI: 10.1093/mnras/stad2641
Аннотация: 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 telescope’s 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.
Добавил в систему: Широков Евгений Вадимович

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Search for directional associations between Baikal Gigaton Volume Detector neutrino-induced cascades and high-energy astrophysical sourcesстатья Исследовательская статья

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