Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 86: Multi-Messenger

T 86.7: Talk

Thursday, March 28, 2019, 17:30–17:45, S13

Gamma-ray counterparts of the IceCube track-type high-energy neutrino events — •Simone Garrappa — DESY Zeuthen

The IceCube neutrino observatory sends public alerts in realtime for the most interesting muon-neutrino track events. Observations performed by the Large Area Telescope (LAT) on board of the Fermi Gamma-ray Space Telescope revealed a flaring gamma-ray blazar, TXS 0506+056, in spatial and temporal coincidence with the neutrino event IceCube-170922A. The presented work searches for further coincidences of high-energy neutrinos with Fermi gamma-ray sources. We find another high-energy neutrino in spatial coincidence with the gamma-ray blazar GB6 J1040+0617. We study this source in detail using 9.6 years of Fermi-LAT data in the 100 MeV - 1 TeV energy range and find that the energetics and the multi-wavelength behavior of the source make it a plausible neutrino source candidate.