27-31 August 2018
LVH, Luisenstraße 58, 10117 Berlin
Europe/Berlin timezone
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Contribution Talk

-1- Lecture hall

Calorimetric assessment of a possible association of the high-energy neutrino IC-170922A with the blazar TXS 0506+056


  • Mr. Michael KRETER

Primary authors


Abstract content

We have previously argued that the probability for the detection of individual neutrinos from individual blazars is expected to scale with the long-term fluence rather than short flares of high gamma-ray flux. Recently, the extremely high energy (EHE) muon neutrino event IceCube-170922A was found to coincide with increased gamma-ray emission from the blazar TXS 0506+056. We use short- and long-term Fermi/LAT gamma-ray and multiwavelength data to obtain a calorimetric assessment of the maximum possible neutrino flux of TXS 0506+056 and a sample of other blazars of similar gamma-ray brightness. We find that an association of the neutrino with a short-term flare of TXS 0506+056 is very unlikely. However, we also find that the long-term fluence of the source accumulated over a long-term outburst since early 2017 is among the highest of all gamma-ray blazars in 2017. From our calorimetric approach, we derive a chance coincidence of the neutrino event IC-170922A with the high-fluence blazar TXS 0506+056, which is independent of other estimates and based on an a-priori-defined method.