학술논문
Baikal-GVD Astrophysical Neutrino Candidate near the Blazar TXS~0506+056
Document Type
Working Paper
Author
Aynutdinov, V. M.; Allakhverdyan, V. A.; Avrorin, A. D.; Avrorin, A. V.; Bardačová, Z.; Belolaptikov, I. A.; Bondarev, E. A.; Borina, I. V.; Budnev, N. M.; Chadymov, V. A.; Chepurnov, A. S.; Dik, V. Y.; Domogatsky, G. V.; Doroshenko, A. A.; Dvornický, R.; Dyachok, A. N.; Dzhilkibaev, Zh. -A. M.; Eckerová, E.; Elzhov, T. V.; Fajt, L.; Fomin, V. N.; Gafarov, A. R.; Golubkov, K. V.; Gorshkov, N. S.; Gress, T. I.; Kebkal, K. G.; Kharuk, I. V.; Khramov, E. V.; Kolbin, M. M.; Koligaev, S. O.; 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.; Erkenov, D. Y. Zvezdov A. K.; Kosogorov, N. A.; Kovalev, Y. A.; Kovalev, Y. Y.; Plavin, A. V.; Popkov, A. V.; Pushkarev, A. B.; Semikoz, D. V.; Sotnikova, Y. V.; Troitsky, S. V.
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Subject
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Abstract
We report on the observation of a rare neutrino event detected by Baikal-GVD in April 2021. The event GVD210418CA is the highest-energy cascade observed by Baikal-GVD so far from the direction below the horizon. The estimated cascade energy is $224\pm75$~TeV. The evaluated signalness parameter of GVD210418CA is 97.1\% using an assumption of the E$^{-2.46}$ spectrum of astrophysical neutrinos. The arrival direction of GVD210418CA is near the position of the well-known radio blazar TXS~0506+056, with the angular distance being within a 90\% directional uncertainty region of the Baikal-GVD measurement. The event was followed by a radio flare observed by the RATAN-600 radio telescope, further strengthening the case for the neutrino-blazar association.
Comment: 9 pages, 6 figures, Contribution to the 38th International Cosmic Rays Conference (ICRC2023). arXiv admin note: text overlap with arXiv:2210.01650
Comment: 9 pages, 6 figures, Contribution to the 38th International Cosmic Rays Conference (ICRC2023). arXiv admin note: text overlap with arXiv:2210.01650