High-energy neutrino-induced cascade from the direction of the flaring radio blazar TXS 0506 + 056 observed by Baikal-GVD in 2021
V A AllakhverdyanJoint Institute for Nuclear Research , Dubna 141980 , RussiaA D AvrorinInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaA V AvrorinInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaV M AynutdinovInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaZ BardačováComenius University , Bratislava 81499 , SlovakiaI A BelolaptikovJoint Institute for Nuclear Research , Dubna 141980 , RussiaE A BondarevInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaI V BorinaJoint Institute for Nuclear Research , Dubna 141980 , RussiaN M BudnevIrkutsk State University , Irkutsk 664003 , RussiaV A ChadymovA S ChepurnovSkobeltsyn Research Institute of Nuclear Physics, Lomonosov Moscow State University , Moscow 119991 , RussiaV Y DikInstitute of Nuclear Physics ME RK , Almaty 050032 , KazakhstanG V DomogatskyInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaA A DoroshenkoInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaR DvornickýComenius University , Bratislava 81499 , SlovakiaA N DyachokIrkutsk State University , Irkutsk 664003 , RussiaZh-A M DzhilkibaevInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaE EckerováComenius University , Bratislava 81499 , SlovakiaT V ElzhovJoint Institute for Nuclear Research , Dubna 141980 , RussiaL FajtCzech Technical University in Prague, Institute of Experimental and Applied Physics , 11000 Prague , Czech RepublicV N FominA R GafarovIrkutsk State University , Irkutsk 664003 , RussiaK V GolubkovInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaN S GorshkovJoint Institute for Nuclear Research , Dubna 141980 , RussiaT I GressIrkutsk State University , Irkutsk 664003 , RussiaK G KebkalLATENA , St Petersburg 199106 , RussiaI KharukInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaE V KhramovJoint Institute for Nuclear Research , Dubna 141980 , RussiaM M KolbinJoint Institute for Nuclear Research , Dubna 141980 , RussiaS O KoligaevINFRAD , Dubna 141981 , RussiaK V KonischevJoint Institute for Nuclear Research , Dubna 141980 , RussiaA V KorobchenkoJoint Institute for Nuclear Research , Dubna 141980 , RussiaA P KoshechkinInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaV A KozhinSkobeltsyn Research Institute of Nuclear Physics, Lomonosov Moscow State University , Moscow 119991 , RussiaM V KruglovJoint Institute for Nuclear Research , Dubna 141980 , RussiaV F KulepovNizhny Novgorod State Technical University , Nizhny Novgorod 603950 , RussiaY E LemeshevIrkutsk State University , Irkutsk 664003 , RussiaM B MileninInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaR R MirgazovIrkutsk State University , Irkutsk 664003 , RussiaD V NaumovJoint Institute for Nuclear Research , Dubna 141980 , RussiaA S NikolaevSkobeltsyn Research Institute of Nuclear Physics, Lomonosov Moscow State University , Moscow 119991 , RussiaD P PetukhovInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaE N PliskovskyJoint Institute for Nuclear Research , Dubna 141980 , RussiaM I RozanovSankt Petersburg State Marine Technical University , Sankt Petersburg 190008 , RussiaE V RyabovIrkutsk State University , Irkutsk 664003 , RussiaG B SafronovInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaD SeitovaInstitute of Nuclear Physics ME RK , Almaty 050032 , KazakhstanB A ShaybonovJoint Institute for Nuclear Research , Dubna 141980 , RussiaM D ShelepovInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaS D ShilkinInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaE V ShirokovSkobeltsyn Research Institute of Nuclear Physics, Lomonosov Moscow State University , Moscow 119991 , RussiaF ŠimkovicComenius University , Bratislava 81499 , SlovakiaA E SirenkoJoint Institute for Nuclear Research , Dubna 141980 , RussiaA V SkurikhinSkobeltsyn Research Institute of Nuclear Physics, Lomonosov Moscow State University , Moscow 119991 , RussiaA G SolovjevJoint Institute for Nuclear Research , Dubna 141980 , RussiaM N SorokovikovJoint Institute for Nuclear Research , Dubna 141980 , RussiaI ŠteklCzech Technical University in Prague, Institute of Experimental and Applied Physics , 11000 Prague , Czech RepublicA P StromakovInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaO V SuvorovaInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaV A TabolenkoIrkutsk State University , Irkutsk 664003 , RussiaB B UlzutuevJoint Institute for Nuclear Research , Dubna 141980 , RussiaY V YablokovaJoint Institute for Nuclear Research , Dubna 141980 , RussiaD N ZaborovInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , RussiaS I ZavyalovJoint Institute for Nuclear Research , Dubna 141980 , RussiaD Y ZvezdovJoint Institute for Nuclear Research , Dubna 141980 , RussiaA K ErkenovSpecial Astrophysical Observatory of RAS , Nizhny Arkhyz 369167 , RussiaN A KosogorovAstro Space Center of Lebedev Physical Institute , Profsoyuznaya 84/32, 117997 Moscow , RussiaYu A KovalevAstro Space Center of Lebedev Physical Institute , Profsoyuznaya 84/32, 117997 Moscow , RussiaY. Y. KovalevAstro Space Center of Lebedev Physical Institute , Profsoyuznaya 84/32, 117997 Moscow , RussiaA. V. PlavinAstro Space Center of Lebedev Physical Institute , Profsoyuznaya 84/32, 117997 Moscow , RussiaA V PopkovAstro Space Center of Lebedev Physical Institute , Profsoyuznaya 84/32, 117997 Moscow , RussiaA. B. PushkarevAstro Space Center of Lebedev Physical Institute , Profsoyuznaya 84/32, 117997 Moscow , RussiaD V SemikozAPC , Université Paris Diderot, CNRS/IN2P3, CEA/IRFU, Sorbonne Paris Cité, 119 75205 Paris , FranceY V SotnikovaSpecial Astrophysical Observatory of RAS , Nizhny Arkhyz 369167 , RussiaS. TroitskyInstitute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , Russia
2023en
ABI
Аннотация
ABSTRACT The existence of high-energy astrophysical neutrinos has been unambiguously demonstrated, but their sources remain elusive. IceCube reported an association of a 290-TeV neutrino with a gamma-ray flare of TXS 0506 + 056, an active galactic nucleus with a compact radio jet pointing to us. Later, radio-bright blazars were shown to be associated with IceCube neutrino events with high statistical significance. These associations remained unconfirmed with the data of independent experiments. Here, we report on the detection of a rare neutrino event with the estimated energy of 224 ± 75 TeV from the direction of TXS 0506 + 056 by the new Baikal Gigaton Volume Detector (Baikal-GVD) in April 2021. This event is the highest energy cascade detected so far by the Baikal-GVD neutrino telescope from a direction below horizon. The result supports previous suggestions that radio blazars in general, and TXS 0506 + 056 in particular, are the sources of high-energy neutrinos, and opens up the cascade channel for the neutrino astronomy.
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