$Fermi$-LAT follow-up observations in seven years of real-time high-energy neutrino alerts ...

The realtime program for high-energy neutrino track events detected by the IceCube South Pole Neutrino Observatory releases alerts to the astronomical community with the goal of identifying electromagnetic counterparts to astrophysical neutrinos. Gamma-ray observations from the $Fermi$-Large Area Te...

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Bibliographic Details
Main Authors: Garrappa, S., Buson, S., Sinapius, J., Franckowiak, A., Liodakis, I., Bartolini, C., Giroletti, M., Nanci, C., Principe, G., Venters, T. M.
Format: Article in Journal/Newspaper
Language:unknown
Published: arXiv 2024
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Online Access:https://dx.doi.org/10.48550/arxiv.2401.06666
https://arxiv.org/abs/2401.06666
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Summary:The realtime program for high-energy neutrino track events detected by the IceCube South Pole Neutrino Observatory releases alerts to the astronomical community with the goal of identifying electromagnetic counterparts to astrophysical neutrinos. Gamma-ray observations from the $Fermi$-Large Area Telescope (LAT) enabled the identification of the flaring gamma-ray blazar TXS 0506+056 as a likely counterpart to the neutrino event IC-170922A. By continuously monitoring the gamma-ray sky, $Fermi$-LAT plays a key role in the identification of candidate counterparts to realtime neutrino alerts. In this paper, we present the $Fermi$-LAT strategy for following up high-energy neutrino alerts applied to seven years of IceCube data. Right after receiving an alert, a search is performed in order to identify gamma-ray activity from known and newly-detected sources that are positionally consistent with the neutrino localization. In this work, we study the population of blazars found in coincidence with high-energy ... : Published on A&A ...