publication 25-August-2019 01:07:14

Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A

Publication date: 12 July 2018

Authors: The IceCube Collaboration et al.

Journal: Science
Volume: 361
Issue: 6379
Year: 2018

Copyright: AAAS

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–electronvolts. 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.

Link to Publication: http://dx.doi.org/10.1126/science.aat1378


Last Update: 12 July 2018

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