Speaker
Mr
Michael Kreter
(University of Wuerzburg)
Description
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.
Primary author
Mr
Michael Kreter
(University of Wuerzburg)
Co-authors
Dr
Felicia Krauss
(Anton Pannekoek Institute for Astronomy, University of Amsterdam)
Dr
Joern Wilms
(Dr. Karl Remeis Sternwarte Bamberg)
Dr
Karl Mannheim
(University of Wuerzburg)
Prof.
Matthias Kadler
(University of Wuerzburg)
Dr
Roopesh Ojha
(Nasa Goddard Space Flight Center)
Dr
Sara Buson
(Nasa Goddard Space Flight Center)
