PHOTOMETRIC PARAMETERS OF RR LYR VARIABLE-STARS IN THE GALACTIC BULGE

We present a complete set of OGLE photometric measurements for 214 RR Lyrae variables in the Galactic bulge, based on four observing seasons : 1992-95. These are mostly I-band measurements, with some V-band obse rvations obtained mainly in 1995. Based on this material we construct the Fourier decomposition of the I-band light curves and investigate d ifferent types of RR Lyr variability. We also determine the value of t he extinction-insensitive parameter VV-I for RR Lyr stars in fields wi th different galactic longitude l and compare with values of VV-I calc ulated for red clump stars by Stanek et al. (1994). The observed and f ree from interstellar extinction mean brightness and V-I color of RR L yr stars are also presented.