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For refcode 1994AJ....108..645H:
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1994AJ....108..645H VARIABLE STARS IN THE LEO A DWARF GALAXY (DDO 69) JOHN G. HOESSEL Washburn Observatory, University of Wisconsin-Madison, 475 N. Charter Street, Madison, Wisconsin 53706 Electronic mail: hoessel@jth.astro.wisc.edu A. SAHA Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 Electronic mail: saha@stsci.edu JOHN KRIST Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 Electronic mail: krist@stsci.edu G. EDWARD DANIELSON Palomar Observatory, California Institute of Technology 170-25, Pasadena, California 91125 Electronic mail: ged@soll.gps.caltech.edu Received 1993 November 2; revised 1994 May 9 ABSTRACT Observations of the Leo A dwarf galaxy, obtained over the period from 1980 to 1991 are reported. Forty two separate CCD frames were searched for variable stars. A total of 14 suspected variables were found, 9 had sufficient coverage for period determination, and 5 had Cepheid light curves. Four of these stars fit well on a P-L relation and yield a distance modulus, after correction for Galactic foreground extinction, of m - M = 26.74. This corresponds to a distance of 2.2 Mpc, placing Leo A near the Local Group zero-velocity surface.
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