Searching for temporary gamma-ray dark blazars associated with IceCube neutrinos ...

• Main Authors: Kun, Emma, Bartos, Imre, Tjus, Julia Becker, Biermann, Peter L., Franckowiak, Anna, Halzen, Francis, Mező, György
• Format: Text
• Language: unknown
• Published: arXiv 2023
• Subjects: High Energy Astrophysical Phenomena astro-ph.HE; FOS Physical sciences; South pole
• Online Access: https://dx.doi.org/10.48550/arxiv.2305.06729; https://arxiv.org/abs/2305.06729

Tensions between the diffuse gamma-ray sky observed by the Fermi Large Area Telescope (LAT) and the diffuse high-energy neutrino sky detected by the IceCube South Pole Neutrino Observatory question our knowledge about high-energy neutrino sources in the gamma-ray regime. While blazars are among the most energetic persistent particle accelerators in the Universe, studies suggest that they could account for up to for 10-30% of the neutrino flux measured by IceCube. Our recent results highlighted that the associated IceCube neutrinos arrived in a local gamma-ray minimum (dip) of three strong neutrino point-source candidates. We increase the sample of neutrino-source candidates to study their gamma-ray light curves. We generate the one-year Fermi-LAT light curve for 8 neutrino source candidate blazars (RBS 0958, GB6 J1040+0617, PKS 1313-333, TXS 0506+056, PKS 1454-354, NVSS J042025-374443, PKS 0426-380 and PKS 1502+106), centered on the detection time of the associated IceCube neutrinos. We apply the Bayesian ... : 14 pages, 10 figures, 4 tables. Accepted for publication in A&A ...