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T: Fachverband Teilchenphysik

T 18: Neutrino Astronomy 1

T 18.4: Talk

Monday, March 21, 2022, 17:00–17:15, T-H31

Blazar stacking using new and improved neutrino point-source analysis method — •Tomas Kontrimas, Martina Karl, and Chiara Bellenghi for the IceCube collaboration — Physik-department, Technische Universität München, D-85748 Garching, Germany

The IceCube Neutrino Observatory has experienced remarkable success in the field of neutrino astronomy since its completion. One of the main goals is to identify sources of the diffuse astrophysical high-energy neutrino flux. In 2018, IceCube found evidence for a correlation between high-energy neutrinos and the blazar TXS 0506+056. Blazars, one of the most powerful objects in the universe, are among the most promising source candidates of high-energy neutrinos. We present a new method improving the accuracy of the likelihood function, including enhanced neutrino reconstruction and data calibration. Furthermore, we discuss a correlation study between IceCube high-energy neutrinos and different classes of blazars.