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Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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Number of Authors: 3302018 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 361, no 6398, p. 147-151Article in journal (Refereed) Published
Abstract [en]

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 3.5 sigma 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.

Place, publisher, year, edition, pages
2018. Vol. 361, no 6398, p. 147-151
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Physical Sciences
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URN: urn:nbn:se:su:diva-159073DOI: 10.1126/science.aat2890ISI: 000438449200038PubMedID: 30002248OAI: oai:DiVA.org:su-159073DiVA, id: diva2:1241634
Available from: 2018-08-24 Created: 2018-08-24 Last updated: 2018-10-27Bibliographically approved

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Ahrens, MaryonBohm, ChristianDumm, Jonathan P.Finley, ChadFlis, SamuelHultqvist, KlasO'Sullivan, ErinWalck, Christian
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