High-energy neutrino-induced cascade from the direction of the flaring radio blazar TXS 0506 + 056 observed by Baikal-GVD in 2021

Author:

Allakhverdyan V A1,Avrorin A D2,Avrorin A V2,Aynutdinov V M2,Bardačová Z34,Belolaptikov I A1,Bondarev E A2,Borina I V1,Budnev N M5,Chadymov V A6,Chepurnov A S7,Dik V Y18,Domogatsky G V2,Doroshenko A A2,Dvornický R3,Dyachok A N5,Dzhilkibaev Zh-A M2,Eckerová E34,Elzhov T V1,Fajt L4,Fomin V N6,Gafarov A R5,Golubkov K V2,Gorshkov N S1,Gress T I5,Kebkal K G9,Kharuk I2,Khramov E V1,Kolbin M M1,Koligaev S O10,Konischev K V1,Korobchenko A V1,Koshechkin A P2,Kozhin V A7,Kruglov M V1,Kulepov V F11,Lemeshev Y E5,Milenin M B2,Mirgazov R R5,Naumov D V1,Nikolaev A S7,Petukhov D P2,Pliskovsky E N1,Rozanov M I12,Ryabov E V5,Safronov G B2,Seitova D18,Shaybonov B A1,Shelepov M D2,Shilkin S D2,Shirokov E V7,Šimkovic F34,Sirenko A E1,Skurikhin A V7,Solovjev A G1,Sorokovikov M N1,Štekl I4,Stromakov A P2,Suvorova O V2,Tabolenko V A5,Ulzutuev B B1,Yablokova Y V1,Zaborov D N2,Zavyalov S I1,Zvezdov D Y1,Erkenov A K13,Kosogorov N A141516ORCID,Kovalev Yu A14,Kovalev Y Y171415ORCID,Plavin A V1814ORCID,Popkov A V1514,Pushkarev A B1914ORCID,Semikoz D V20,Sotnikova Y V13ORCID,Troitsky S V221ORCID,

Affiliation:

1. Joint Institute for Nuclear Research , Dubna 141980 , Russia

2. Institute for Nuclear Research of the Russian Academy of Sciences , 60th October Anniversary Prospect 7a, Moscow 117312 , Russia

3. Comenius University , Bratislava 81499 , Slovakia

4. Czech Technical University in Prague, Institute of Experimental and Applied Physics , 11000 Prague , Czech Republic

5. Irkutsk State University , Irkutsk 664003 , Russia

6. Independent Researcher

7. Skobeltsyn Research Institute of Nuclear Physics, Lomonosov Moscow State University , Moscow 119991 , Russia

8. Institute of Nuclear Physics ME RK , Almaty 050032 , Kazakhstan

9. LATENA , St Petersburg 199106 , Russia

10. INFRAD , Dubna 141981 , Russia

11. Nizhny Novgorod State Technical University , Nizhny Novgorod 603950 , Russia

12. Sankt Petersburg State Marine Technical University , Sankt Petersburg 190008 , Russia

13. Special Astrophysical Observatory of RAS , Nizhny Arkhyz 369167 , Russia

14. Astro Space Center of Lebedev Physical Institute , Profsoyuznaya 84/32, 117997 Moscow , Russia

15. Moscow Institute of Physics and Technology , Institutsky per. 9, Dolgoprudny 141700 , Russia

16. Cahill Center for Astronomy and Astrophysics , MC 249-17 California Institute of Technology, Pasadena, CA 91125 , USA

17. Max-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn , Germany

18. Black Hole Initiative at Harvard University , 20 Garden Street, Cambridge, MA 02138 , USA

19. Crimean Astrophysical Observatory , Nauchny 298409, Crimea , Russia

20. APC , Université Paris Diderot, CNRS/IN2P3, CEA/IRFU, Sorbonne Paris Cité, 119 75205 Paris , France

21. Physics Department , M.V. Lomonosov Moscow State University, 1-2 Leninskie Gory, Moscow 119991 , Russia

Abstract

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.

Funder

European Regional Development Fund

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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