Detecting Hyper-Luminous X-ray sources among Low-Luminosity AGN ignitions in normal galaxies

We propose two ToOs (45 ks each) to follow up on luminous extragalactic X-ray ignitions, to detect new Hyper-Luminous X-ray sources (HLXs). During the all-sky scans of eROSITA, ignition events with a luminosity range log(Lx)=41.5-42 were detected in local galaxies. This luminosity range is of particular interest as it covers the overlap of Hyper-Luminous X-ray sources (HLXs) and low-luminosity AGN. The nuclei of the host galaxies of these ignition events showed no change in their optical spectra, when comparing before and after the X-ray brightening. The proposed pilot study investigates whether HLXs are in fact responsible for these ignitions. This programme has the potential of discovering the most luminous HLX to date.