Historic microlensing events in the Euclid Galactic Bulge Survey

Microlensing campaigns have a long history of observations covering the Galactic bulge, whereby thousands of detections have been obtained, including many exoplanetary systems. The Euclid Galactic Bulge Survey (EGBS) represents a unique opportunity to revisit a large number of past events and attempt a lens-source resolution of known events falling in the covered area. As the analysis of individual events requires significant effort, it is important to establish priorities among all possible targets by identifying specific candidates with a higher chance for a successful resolution of the lens from the source and with the greatest scientific interest. Drawing from the databases of the three main microlensing surveys (OGLE, MOA, and KMTNet), we compiled the complete catalog of past microlensing events in the Euclid survey footprint up to the year 2023, containing 7801 entries. By remodeling all events and cross-checking with Galactic models, we were able to estimate the relative lens-source proper motions for all events. Taking into account all uncertainties, for each microlensing event, we were also able to estimate the probability of the lens being separated from the source by more than a given angular distance threshold. We then ranked all events by their resolution probability, providing additional useful information that will guide future analyses of the most promising candidates. In particular, special attention was dedicated to the 51 known planetary microlensing events.