TY  - JOUR
AU  - ANTARES Collaboration (Albert, A. et al
AU  - Alves, S.
AU  - Calvo, D.
AU  - Carretero, V.
AU  - Gozzini, R.
AU  - Hernandez-Rey, J. J.
AU  - Lazo, A.
AU  - Manczak, J.
AU  - Real, D.
AU  - Sanchez-Losa, A.
AU  - Saina, A.
AU  - Salesa Greus, F.
AU  - Zornoza, J. D.
AU  - Zuñiga, J.
PY  - 2024
DA  - 2024//
TI  - Searches for Neutrinos in the Direction of Radio-bright Blazars with the ANTARES Telescope
T2  - Astrophys. J.
JO  - Astrophysical Journal
SP  - 3 - 13pp
VL  - 964
IS  - 1
PB  - IOP Publishing Ltd
AB  - Active galaxies, especially blazars, are among the most promising extragalactic candidates for high-energy neutrino sources. To date, ANTARES searches included these objects and used GeV-TeV gamma-ray flux to select blazars. Here, a statistically complete blazar sample selected by their bright radio emission is used as the target for searches of origins of neutrinos collected by the ANTARES neutrino telescope over 13 yr of operation. The hypothesis of a neutrino-blazar directional correlation is tested by pair counting and a complementary likelihood-based approach. The resulting posttrial p-value is 3.0% (2.2 sigma in the two-sided convention). Additionally, a time-dependent analysis is performed to search for temporal clustering of neutrino candidates as a means of detecting neutrino flares in blazars. None of the investigated sources alone reaches a significant flare detection level. However, the presence of 18 sources with a pretrial significance above 3 sigma indicates a p = 1.4% (2.5 sigma in the two-sided convention) detection of a time-variable neutrino flux. An a posteriori investigation reveals an intriguing temporal coincidence of neutrino, radio, and gamma-ray flares of the J0242+1101 blazar at a p = 0.5% (2.9 sigma in the two-sided convention) level. Altogether, the results presented here suggest a possible connection of neutrino candidates detected by the ANTARES telescope with radio-bright blazars.
SN  - 0004-637x
UR  - https://arxiv.org/abs/2309.06874
UR  - https://doi.org/10.3847/1538-4357/ad1f5b
DO  - 10.3847/1538-4357/ad1f5b
LA  - English
N1  - WOS:001183251300001
ID  - ANTARESCollaborationAlbert_etal2024
ER  -