RRB: Impact of Rubin precursor observations on microlensing events in Roman

The Roman space mission will launch a year after the Rubin telescope start his science operations. This allows us to contribute to improving the detectability of microlensing events in the Roman Exoplanet Survey. Rubin will observe the same Roman field for a year, allowing the sources at that location to be characterized for later detection of microlensing events. This work seeks to quantify how much scientific return will be improved by combining these observations.