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The Multimessenger Nature of Active Galactic Nuclei

Presentation #205.05 in the session Multi-Messenger Astrophysics.

Published onMay 03, 2024
The Multimessenger Nature of Active Galactic Nuclei

On 22 September 2017, IceCube reported a high-energy neutrino event, which was found to be coincident with a flaring blazar, TXS 0506+056. This multi-messenger observation, with IceCube neutrinos and gamma-rays detected by Fermi-LAT, hinted at blazars being sources of observed high-energy astrophysical neutrinos. However, a separate time-integrated study using IceCube data reported that a Seyfert galaxy, NGC 1068, is a source of astrophysical neutrinos. Because of the different nature of the two sources and the lack of significant neutrino and gamma-ray correlation, this causes confusion regarding the processes that lead to the production of these neutrinos in Active Galaxies. This issue can be tackled by more multi-messenger observations and relevant studies. Our work discusses a correlation study between neutrinos and photons from different wavelengths in AGN. This correlation study uses both model-dependent and model-independent approaches along with the data observed using the NICER telescope and IceCube. We will also discuss how our work compares to other published analyses using IceCube data.

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