Seyfert galaxy targets for KM3NeT neutrino telescope

TL;DR

This paper identifies specific Seyfert galaxies detectable by the KM3NeT neutrino telescope, based on their X-ray luminosity and IceCube data, to verify neutrino signals from these sources.

Contribution

It defines a catalog of Seyfert galaxies expected to be detectable by KM3NeT, enhancing targeted neutrino source searches.

Findings

Four Seyfert galaxies are potentially detectable by KM3NeT.

Detection depends on spectral templates based on IceCube data.

Uncertainties are discussed due to the Compton-thick nature of some sources.

Abstract

Neutrino signal from a population of Seyfert galaxies has been detected by IceCube neutrino telescope in the muon neutrino channel that has sensitivity mostly to the Northern Hemisphere sources. This detection can be verified by KM3NeT telescope that has sensitivity also in the Southern Hemisphere. We define a catalog of Seyfert galaxies that are expected to be detectable with KM3NeT, assuming that the neutrino luminosity scales with the intrinsic hard X-ray luminosity of the sources. We find that four sources: NGC 1068, NGC 4151, NGC 4945 and Circinus galaxy, are detectable by KM3NeT, if their spectra follow either NGC 1068 or NGC 4151 spectral template based on IceCube data. We discuss uncertainties of the neutrino flux estimate, considering the Compton-thick nature of three of the four detectable sources: NGC 1068, NGC 4945 and Circinus. The limited catalog of the four sources can be used in KM3NeT source search to reduce the trial factor of analysis aimed at independent verification of the neutrino signal from Seyfert galaxies.