149 citations · 857 across the 33 of their papers we have counts for
34 papers
Combined constraints on the diffuse flux of cosmic neutrinos between 10^16 eV and 10^26 eV
S. V. Troitsky
Experimental constraints on the diffuse neutrino flux above the PeV range have been obtained with Cherenkov neutrino telescopes, air-shower arrays, radio detectors in and above pol…
Reassessing the contribution of long-GRB high-energy afterglows to the isotropic gamma-ray background after GRB 221009A
S. V. Troitsky
Very-high-energy photons from gamma-ray bursts (GRBs) are absorbed by the extragalactic background light and partly reprocessed into the GeV band. We update previous estimates of t…
A hidden ultra-relativistic spine in the jet of a neutrino-associated blazar
Y. Y. Kovalev, F. Eppel, D. C. Homan +16
Supermassive black holes launch powerful jets of plasma that can accelerate particles to extreme energies, but the physical conditions required to produce high-energy neutrinos rem…
Multi-messenger flare in the quasar PKS 0446+11
Y. Y. Kovalev, M. F. Aller, A. K. Erkenov +15
The physical mechanisms driving neutrino and electromagnetic flares in blazars remain poorly understood. We investigate a prominent multi-messenger flare in the quasar PKS 1424+240…
Can a gamma-ray dim radio blazar produce a 200-PeV neutrino? The case of PMN J06060724 and KM3-230213A
Polina Kivokurtseva, Sergey Troitsky
An extremely energetic muon has been recently detected by the Cubic Kilometre Neutrino Telescope (KM3NeT), indicating the observation of a neutrino with the estimated energy of $\l…
Looking into the Jet Cone of the Neutrino-Associated Very High Energy Blazar PKS 1424+240
Y. Y. Kovalev, A. B. Pushkarev, J. L. Gomez +7
The acceleration process of massive particles as well as the production of very high energy (VHE) photons and neutrinos remains a fundamental challenge in astrophysics. We investig…
Extreme Jet Beaming Observed in Neutrino-Associated Blazars
Alexander V. Plavin, Yuri Y. Kovalev, Sergey V. Troitsky
Bright blazars were found to be prominent neutrino sources, and a number of IceCube events were associated with them over recent years. A particularly strong observational connecti…
Characterizing Candidate Blazar Counterparts of the Ultra-High-Energy Event KM3-230213A
KM3NeT Collaboration, MessMapp Group, LAT Collaboration +13
High-energy astrophysical neutrinos serve as crucial messengers for understanding hadronic acceleration processes and identifying the origins of cosmic rays, with blazars among the…
Probing the Galactic neutrino flux at neutrino energies above 200 TeV with the Baikal Gigaton Volume Detector
V. A. Allakhverdyan, A. D. Avrorin, A. V. Avrorin +67
Recent observations of the Galactic component of the high-energy neutrino flux, together with the detection of the diffuse Galactic gamma-ray emission up to sub-PeV energies, open…
Anomalous cosmic-ray correlations revisited with a complete full-sky sample of BL Lac type objects
M. A. Kudenko, S. V. Troitsky
Cosmic rays with energies above eV, observed in 1999-2004 by the High Resolution Fly's Eye (HiRes) experiment in the stereoscopic mode, were found to correlate with direc…
An isotropic full-sky sample of optically selected blazars
Maria Kudenko, Sergey Troitsky
Various high-energy phenomena in the Universe are associated with blazars, powerful active galaxies with jets pointing to the observer. Novel results relating blaza…
The origin of high-energy astrophysical neutrinos: new results and prospects
Sergey Troitsky
High-energy neutrino astrophysics is rapidly developing, and in the last two years, new and exciting results have been obtained. Among them are the confirmation of the existence of…
Diffuse neutrino flux measurements with the Baikal-GVD neutrino telescope
V. M. Aynutdinov, V. A. Allakhverdyan, A. D. Avrorin +68
Baikal-GVD is a next generation, kilometer-scale neutrino telescope currently under construction in Lake Baikal. GVD consists of multi-megaton subarrays (clusters) and is designed…
Searches for neutrinos in the direction of radio-bright blazars with the ANTARES telescope
ANTARES Collaboration, A. Albert, S. Alves +162
Active galaxies, especially blazars, are among the most promising neutrino source candidates. To date, ANTARES searches for these objects considered GeV-TeV -ray bright blazars.…
Search for directional associations between Baikal Gigaton Volume Detector neutrino-induced cascades and high-energy astrophysical sources
V. A. Allakhverdyan, A. D. Avrorin, A. V. Avrorin +65
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-G…
Baikal-GVD Astrophysical Neutrino Candidate near the Blazar TXS~0506+056
V. M. Aynutdinov, V. A. Allakhverdyan, A. D. Avrorin +71
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 t…
Probing neutrino production in blazars by millimeter VLBI
Y. Y. Kovalev, A. V. Plavin, A. B. Pushkarev +1
The advancement of neutrino observatories has sparked a surge in multi-messenger astronomy. Multiple neutrino associations among blazars are reported while neutrino production site…
Neutrino flares of radio blazars observed from TeV to PeV
Alisa Suray, Sergey Troitsky
Radio blazars have been linked both to individual high-energy neutrino events and to excesses in likelihood sky maps constructed from lower-energy neutrino data. However, the exact…
Neutrino production in blazar radio cores
O. E. Kalashev, P. Kivokurtseva, S. Troitsky
Models of the origin of astrophysical neutrinos with energies from TeVs to PeVs are strongly constrained by multimessenger observations and population studies. Recent results point…
Diffuse neutrino flux measurements with the Baikal-GVD neutrino telescope
Baikal Collaboration, V. A. Allakhverdyan, A. D. Avrorin +55
We report on the first observation of the diffuse cosmic neutrino flux with the Baikal-GVD neutrino telescope. Using cascade-like events collected by Baikal-GVD in 2018--2021, a si…
Growing evidence for high-energy neutrinos originating in radio blazars
A. V. Plavin, Y. Y. Kovalev, Y. A. Kovalev +1
Evidence for bright radio blazars being high-energy neutrino sources was found in recent years. However, specifics of how and where these particles get produced still need to be de…
Parameters of axion-like particles required to explain high-energy photons from GRB 221009A
S. V. Troitsky
Recent astrophysical transient Swift J1913.1+1946 is possibly associated with the gamma-ray burst GRB 221009A at the redshift z=0.151. The transient was accompanied by very high-en…
High-energy neutrino-induced cascade from the direction of the flaring radio blazar TXS 0506+056 observed by Baikal-GVD in 2021
GVD Collaboration, A. K. Erkenov, N. A. Kosogorov +8
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 wi…
Galactic contribution to the high-energy neutrino flux found in track-like IceCube events
Y. Y. Kovalev, A. V. Plavin, S. V. Troitsky
Astrophysical sources of neutrinos detected by large-scale neutrino telescopes remain uncertain. While there exist statistically significant observational indications that a part o…