Investigating the AGN-neutrino connection with public IceCube data

We present the first application of a newly developed hierarchical Bayesian analysis framework for the detection of point-like sources of high-energy neutrinos. We verify that we are able to reproduce the results of the standard frequentist approach for the case of NGC 1068, a Seyfert II galaxy. Our results are robust against reasonable variations of the spectral index prior. However, simulated event rates of mainly atmospheric events do not agree with measurements, presumably due to the binning of the provided instrument response function. We propose an adaptation for the issue and draw a coherent picture of the impact on point source analyses. For future studies moving from finding to characterising sources of high-energy neutrinos the accuracy of the detector response is pivotal for drawing conclusions about the source spectrum.