Publications (1)0 Total impact
ABSTRACT: The Survey for Transiting Extrasolar Planets in Stellar Systems (STEPSS)
project is a search for planetary transits in open clusters. In this paper, we
analyze the STEPSS observations of the open cluster NGC 1245 to determine the
variable star content of the cluster. Out of 6787 stars observed with V < 22,
of which ~870 are cluster members, we find 14 stars with clear intrinsic
variability that are potential cluster members, and 29 clear variables that are
not cluster members. None of these variables have been previously identified.
We present light curves, finding charts, and stellar/photometric data on these
variable objects. Several of the interacting binaries have estimated distances
consistent with the cluster distance determined from isochrone fits to the
color magnitude diagram. Four stars at the main sequence turnoff of the cluster
have light curves consistent with gamma Doradus variability. If these gamma
Doradus candidates are confirmed, they represent the oldest and coolest members
of this class of variable discovered to date.