Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
Date
2018
Authors
Aartsen, M.G.
Ackermann, M.
Adams, J.
Aguilar, J.A.
Ahlers, M.
Ahrens, M.
Al Samarai, I.
Altmann, D.
Andeen, K.
Anderson, T.
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Journal article
Citation
Science, 2018; 361(6398):eaat1378-1-eaat1378-8
Statement of Responsibility
M.G. Aartsen … G.C. Hill … A. Kyriacou … S. Robertson … A. Wallace … G. Rowell … B.J. Whelan … S. Einecke … F. Voisin ... [et al.](The IceCube Collaboration, Fermi-LAT, MAGIC, AGILE, ASAS-SN, HAWC, H.E.S.S, INTEGRAL, Kanata, Kiso, Kapteyn, Liverpool Telescope, Subaru, Swift/NuSTAR, VERITAS, and VLA/17B-403 teams)
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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 ~290 tera-electron volts. Its arrival direction was consistent with the location of a known γ-ray blazar, TXS 0506+056, observed to be in a flaring state. An extensive multiwavelength campaign followed, ranging from radio frequencies to γ-rays. These observations characterize the variability and energetics of the blazar and include the detection of TXS 0506+056 in very-high-energy γ-rays. This observation of a neutrino in spatial coincidence with a γ-ray-emitting blazar during an active phase suggests that blazars may be a source of high-energy neutrinos.
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© 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works http://www.sciencemag.org/about/science-licenses-journal-article-reuseThis is an article distributed under the terms of the Science Journals Default License.