Speaker
Description
Recent IceCube measurements have identified the central regions of active galactic nuclei (AGN) as promising sites for cosmic-ray acceleration, largely through correlation studies with X-ray bright sources. Since X-ray emission is typically dominated by the AGN over the host galaxy, it serves as a robust proxy of the central activity correlated with the expected neutrino flux. Previous IceCube studies have often relied on AGNs detected by the wide-field hard X-ray satellite Swift-BAT; however, its sub-degree PSF can lead to contamination from broader components such as AGN jets and star-forming activities. To mitigate this effect, optical emission lines can be alternatively used to identify and quantify the intrinsic AGN activities. In this presentation, we will present a new high-statistics catalog of AGN samples extracted from two large optical spectroscopy catalogs, SDSS and DESI, using the emission line fluxes. Then, we will discuss the progress of the correlation study with the latest IceCube neutrino dataset.
