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Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert
- Source :
- arXiv
- Publication Year :
- 2018
- Publisher :
- American Association for the Advancement of Science, 2018.
-
Abstract
- 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 the first identifiable sources of the high-energy astrophysical neutrino flux.
- Subjects :
- Physics
High Energy Astrophysical Phenomena (astro-ph.HE)
Multidisciplinary
010308 nuclear & particles physics
Astrophysics::High Energy Astrophysical Phenomena
Gamma ray
Flux
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
High Energy Physics - Experiment
law.invention
High Energy Physics - Experiment (hep-ex)
13. Climate action
law
general
0103 physical sciences
High Energy Physics::Experiment
Neutrino
Astrophysics - High Energy Astrophysical Phenomena
Blazar
010303 astronomy & astrophysics
Event (particle physics)
Flare
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- arXiv
- Accession number :
- edsair.doi.dedup.....97cc7f51c767f58c569c0e4d693b6bf7