Cl* NGC 2099 HGH V1421 , the SIMBAD biblio

We have conducted a deep (15≲r≲23), 20 night survey for transiting planets in the intermediate-age (∼550 Myr) open cluster M37 (NGC 2099) using the Megacam wide-field mosaic CCD camera on the 6.5 m MMT. In this paper we present a catalog and light curves for 1445 variable stars; 1430 (99%) of these are new discoveries. We have discovered 20 new eclipsing binaries and 31 new short-period (P<1 day) pulsating stars. The bulk of the variables are most likely rapidly rotating young low-mass stars, including a substantial number (≳500) that are members of the cluster. We identify and analyze five particularly interesting individual variables, including a previously identified variable that we suggest is probably a hybrid γ Doradus/δ Scuti pulsator, two possible quiescent cataclysmic variables, a detached eclipsing binary (DEB) with at least one γ Doradus pulsating component (only the second such variable found in an eclipsing binary), and a low-mass (M_P∼M_S∼0.6 M_☉) DEB that is a possible cluster member. A preliminary determination of the physical parameters for the DEB+γ Doradus system yields M_P=1.58±0.04 M_☉, M_S=1.58±0.04 M_☉, R_P=1.39±0.07 R_☉, and R_S=1.38±0.07 R_☉.