Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert
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Author(s)
Arguelles Delgado, Carlos A
Axani, Spencer Nicholas
Collin, G. H.
Conrad, Janet Marie
Moulai, Marjon H.
IceCube Collaboration
Date Issued
July 2018
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Aartsen, Mark et al. “Neutrino Emission from the Direction of the Blazar TXS 0506+056 Prior to the IceCube-170922A Alert.” Science (July 2018): eaat2890.
Version
Author's final manuscript
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1126/science.aat2890
