Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
Jul 12, 2018
10 pages
Published in:
- Science 361 (2018) 6398, eaat1378
- Published: Jul 12, 2018
e-Print:
- 1807.08816 [astro-ph.HE]
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Abstract:
Neutrinos interact only very weakly with matter, but giant detectors have succeeded in detecting small numbers of astrophysical neutrinos. Aside from a diffuse background, only two individual sources have been identified: the Sun and a nearby supernova in 1987. A multiteam collaboration detected a high-energy neutrino event whose arrival direction was consistent with a known blazar—a type of quasar with a relativistic jet oriented directly along our line of sight. The blazar, TXS 0506+056, was found to be undergoing a gamma-ray flare, prompting an extensive multiwavelength campaign. Motivated by this discovery, the IceCube collaboration examined lower-energy neutrinos detected over the previous several years, finding an excess emission at the location of the blazar. Thus, blazars are a source of astrophysical neutrinos.- blazar: emission
- gamma ray: emission
- gamma ray: VHE
- supernova
- flux
- messenger
- neutrino
- background
- quasar
- jet: relativistic
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