Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
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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. "Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A." Science 361, 6398 (July 2018): eaat1378 © 2018 The Authors
Version
Author's final manuscript
Abstract
Previous detections of individual astrophysical sources of neutrinos are limited to the Sun and the supernova 1987A, whereas the origins of the diffuse flux of high-energy cosmic neutrinos remain unidentified. On 22 September 2017, we detected a high-energy neutrino, IceCube-170922A, with an energy of e290 tera-electron volts. Its arrival direction was consistent with the location of a known g-ray blazar, TXS 0506+056, observed to be in a flaring state. An extensive multiwavelength campaign followed, ranging from radio frequencies to g-rays. These observations characterize the variability and energetics of the blazar and include the detection of TXS 0506+056 in very-high-energy g-rays. This observation of a neutrino in spatial coincidence with a g-ray-emitting blazar during an active phase suggests that blazars may be a source of high-energy neutrinos.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1126/science.aat1378
