Calorimetric neutrino expectations from bright blazar flares
Kreter M, Kadler M, Krauß F, Buson S, Ojha R, Mannheim K, Wilms J, Böttcher M (2019)
Publication Type: Conference contribution
Publication year: 2019
Journal
Publisher: Sissa Medialab Srl
Book Volume: 358
Conference Proceedings Title: Proceedings of Science
Event location: Madison, WI
Abstract
Blazar jets are extreme environments, in which relativistic proton interactions with an ultraviolet photon field could give rise to photopion production. High-confidence associations of individual high-energy neutrinos with blazar flares could be achieved via spatially and temporally coincident detections. In 2017, the track-like, extremely high-energy neutrino event IC 170922A was found to coincide with increased γ-ray emission from the blazar TXS 0506+056, leading to the identification of the most promising neutrino source candidate so far. We test the chance coincidence of such events by calculating the expected number of neutrinos that can be detected by IceCube, based on a broadband parametrization of bright short-term blazar flares that were observed in the past 8 years by Fermi/LAT. We find that the integrated keV-to-GeV fluence of most individual blazar flares is far too small to yield a substantial Poisson probability for the detection of one or more neutrinos with IceCube. In contrast to such short-term flares that usually last only a few days or less, TXS0506+056 did show a major outburst that lasted several months, giving rise to a much higher fluence than most short blazar flares. We show, based on the calorimetric argumentation presented in this work, that the association of the IC 170922A neutrino with TXS 0506+056 is energetically plausible at a significance level of about 3.5 sigma. We further discuss strategies to search for more significant associations in future data unblindings of IceCube and KM3NeT.
Authors with CRIS profile
Involved external institutions
Julius-Maximilians-Universität Würzburg
Germany (DE)
Noordwes-Universiteit / North-West University
South Africa (ZA)
National Aeronautics and Space Administration (NASA)
United States (USA) (US)
University of Amsterdam
Netherlands (NL)
Germany (DE)
Noordwes-Universiteit / North-West University
South Africa (ZA)
National Aeronautics and Space Administration (NASA)
United States (USA) (US)
University of Amsterdam
Netherlands (NL)
How to cite
APA:
Kreter, M., Kadler, M., Krauß, F., Buson, S., Ojha, R., Mannheim, K.,... Böttcher, M. (2019). Calorimetric neutrino expectations from bright blazar flares. In Proceedings of Science. Madison, WI, US: Sissa Medialab Srl.
MLA:
Kreter, Michael, et al. "Calorimetric neutrino expectations from bright blazar flares." Proceedings of the 36th International Cosmic Ray Conference, ICRC 2019, Madison, WI Sissa Medialab Srl, 2019.
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