276 citations · 1.8k across the 25 of their papers we have counts for
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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…
A wiggling filamentary jet at the origin of the blazar multi-wavelength behaviour
C. M. Raiteri, M. Villata, M. I. Carnerero +96
Blazars are beamed active galactic nuclei known for their strong multi-wavelength variability on timescales from years down to minutes. We aim to investigate the suitability of the…
Multi-band Cross-correlated Radio Variability of the Blazar 3C 279
Krishna Mohana A, Alok C. Gupta, Alan P. Marscher +18
We present the results of our study of cross-correlations between long-term multi-band observations of the radio variability of the blazar 3C 279. More than a decade (2008-2022) of…
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.…
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…
Directional association of TeV to PeV astrophysical neutrinos with radio blazars
A. V. Plavin, Y. Y. Kovalev, Y. A. Kovalev +1
Recently we have shown that high-energy neutrinos above 200 TeV detected by IceCube are produced within several parsecs in the central regions of radio-bright blazars, that is acti…
Multiwavelength behaviour of the blazar 3C279: decade-long study from -ray to radio
V. M. Larionov, S. G. Jorstad, A. P. Marscher +84
We report the results of decade-long (2008-2018) -ray to 1 GHz radio monitoring of the blazar 3C 279, including GASP/WEBT, and data, as well as polarim…
Observational evidence for the origin of high-energy neutrinos in parsec-scale nuclei of radio-bright active galaxies
A. V. Plavin, Y. Y. Kovalev, Y. A. Kovalev +1
Observational information on high-energy astrophysical neutrinos is being continuously collected by the IceCube observatory. However, the sources of neutrinos are still unknown. In…
The high brightness temperature of B0529+483 revealed by RadioAstron and implications for interstellar scattering
S. V. Pilipenko, Y. Y. Kovalev, A. S. Andrianov +22
The high brightness temperatures, K, detected in several active galactic nuclei by RadioAstron space VLBI observations challenge theoretical limits. R…
RadioAstron Observations of the Quasar 3C273: a Challenge to the Brightness Temperature Limit
Y. Y. Kovalev, N. S. Kardashev, K. I. Kellermann +17
Inverse Compton cooling limits the brightness temperature of the radiating plasma to a maximum of K. Relativistic boosting can increase its observed value, but apparent…
The July 2010 outburst of the NLS1 PMN J0948+0022
L. Foschini, G. Ghisellini, L. Maraschi +23
We report about the multiwavelength campaign on the Narrow-Line Seyfert 1 (NLS1) Galaxy PMN J0948+0022 (z = 0.5846) performed in 2010 July-September and triggered by high activity…
MAGIC and Multi-Wavelength Observations of Mrk 180 and 1ES 2344+514 in 2008
S. Rügamer, E. Angelakis, D. Bastieri +14
Simultaneous multi-wavelength (MW) campaigns are the most promising approaches to investigate the still unrevealed nature of blazars, active galactic nuclei which are variable on a…
Insights Into the High-Energy Gamma-ray Emission of Markarian 501 from Extensive Multifrequency Observations in the Fermi Era
LAT collaboration, A. A. Abdo et al., the MAGIC collaboration +6
We report on the gamma-ray activity of the blazar Mrk 501 during the first 480 days of Fermi operation. We find that the average LAT gamma-ray spectrum of Mrk 501 can be well descr…
Multiwavelength Observations of Mrk 501 in 2008
D. Kranich, D. Paneque, A. Cesarini +16
The well-studied VHE (E >100 GeV) blazar Mrk 501 was observed between March and May 2008 as part of an extensive multiwavelength observation campaign including radio, optical, X-ra…