FOURIER COEFFICIENTS OF OGLE VARIABLES - II - RR LYRAES

Fourier coefficients for RR Lyraes in the OGLE survey are compared to the coefficients of field and cluster RR Lyraes. Based upon the locati on of the Bailey type ab and c stars for a range of metallicity, it ap pears that the vast majority of the OGLE variables have a [Fe/H] near -1.1. Using both empirical and theoretical relations for the Fourier c oefficients, stellar characteristics are found to be similar to those derived in other RR Lyrae studies. There are also some stars in the OG LE sample which appear to be of a slightly different metal abundance, as well as some which are members of the Sagittarius dwarf galaxy. The se latter stars do show a slight metal deficiency relative to most of the OGLE stars. The OGLE variables give a distance to the Galactic bul ge of approximately 8 kpc, and a distance to the Sagittarius dwarf gal axy of about 25 kpc.