Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert

Science
IceCube Collaboration

Abstract

A high-energy neutrino event detected by IceCube on 22 September 2017 was coincident in direction and time with a gamma-ray flare from the blazar TXS 0506+056. Prompted by this association, we investigated 9.5 years of IceCube neutrino observations to search for excess emission at the position of the blazar. We found an excess of high-energy neutrino events, with respect to atmospheric backgrounds, at that position between September 2014 and March 2015. Allowing for time-variable flux, this constitutes 3.5σ evidence for neutrino emission from the direction of TXS 0506+056, independent of and prior to the 2017 flaring episode. This suggests that blazars are identifiable sources of the high-energy astrophysical neutrino flux.

References

Sep 23, 2014·Physical Review Letters·M G AartsenUNKNOWN IceCube Collaboration
Jul 14, 2018·Science·UNKNOWN IceCube CollaborationUNKNOWN VLA/17B-403 teams

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Citations

Nov 12, 2019·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·A Margiotta
Mar 2, 2019·Physical Review Letters·M G AartsenT Yuan
Jul 20, 2018·Proceedings of the National Academy of Sciences of the United States of America·Nola Taylor Redd
Feb 28, 2019·Proceedings of the National Academy of Sciences of the United States of America·Stephen Ornes
Jul 20, 2019·Physical Review Letters·Mauricio Bustamante, Markus Ahlers
Feb 23, 2020·Physical Review Letters·M G AartsenM Zöcklein
Jul 14, 2018·Science·UNKNOWN IceCube CollaborationUNKNOWN VLA/17B-403 teams
Jun 17, 2020·Reports on Progress in Physics·Yanou CuiPedro A N Machado
Oct 24, 2018··Silvia Celli, Silvia Celli

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