Search for Variables in the Leo~II Dwarf Spheroidal
Session 39 -- Spiral, Dwarf and Irregular Galaxies
Display presentation, Wednesday, June 14, 1995, 9:20am - 6:30pm

## [39.05] Search for Variables in the Leo~II Dwarf Spheroidal

B.Canzian, A.Henden (USRA), H.Harris (U.S. Naval Observatory)

We are engaged in a wide-field search for variables in the distant dwarf spheroidal galaxy Leo~II. This search employs the 1-meter telescope at the U.S.~Naval Observatory Flagstaff station with Tektronix $1024^2$ and $2048^2$ CCD detectors. The field of view of the smaller detector, $11\rm\,arcmin$, includes most of the stars of the galaxy, while that of the larger detector, $23\rm\,arcmin$, encloses the tidal radius. Our photometry reaches the horizontal branch with accuracy 10\% or better, enabling detection of RR~Lyrae variables. We present a finding chart for historic and new variable stars, some representative light curves, and a color-magnitude diagram for the galaxy.