Searching for Short-Period Variables in M31: Method and Catalogs

Utilizing high-cadence and continuous g- and r-band data over three nightsacquired from the 3.6-meter Canada France Hawaii Telescope (CFHT) aimed to findshort-duration microlensing events, we conduct a systematic search forvariables, transients, and asteroids across a ∼1^∘ field of view ofthe Andromeda Galaxy (M 31). We present a catalog of 5859 variable stars,yielding the most extensive compilation of short-period variable sources of M31. We also detected 19 flares, predominantly associated with foreground Mdwarfs in the Milky Way. In addition, we discovered 17 previously unknownasteroid candidates, and we subsequently reported them to the Minor PlanetCenter. Lastly, we report a microlensing event candidate C-ML-1 and present apreliminary analysis.