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EP: Fachverband Extraterrestrische Physik

EP 13: Astrophysics: Galaxies II

EP 13.5: Talk

Thursday, March 23, 2023, 18:45–19:00, ZEU/0160

Investigating the blazar-neutrino connection with public IceCube data — •Julian Kuhlmann and Francesca Capel — Max-Planck-Institut fuer Physik

The IceCube collaboration has found evidence for two active galactic nuclei, NGC 1068 and TXS0506+056, being sources of high energy neutrinos. However, catalog-based searches have yet to yield conclusive evidence for the role of different source populations in contributing to the observed astrophysical neutrino flux.

We present two open-source statistical analysis frameworks for the investigation of possible sources with publicly available IceCube data, which implement complementary frequentist and Bayesian approaches. We first demonstrate the capabilities of these frameworks on simulated data, and then apply them to investigate blazars as possible neutrino sources. We focus on bringing more information from multi-wavelength studies into the analyses, and studying both individual sources and the population as a whole. We discuss the advantages of the novel Bayesian approach and the implications of our results for the blazar-neutrino connection.