1997/04/03 by A. Olech, Olech, Arkadiusz
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #FOS: Physical sciences #Stellar, planetary, and galactic studies
paper · pdf · doi:10.48550/arxiv.astro-ph/9704036
openalex publication_date 1997/04/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 observations obtained mainly in 1995. Based on this material we construct the Fourier decomposition of the I-band light curves and investigate different types of RR Lyr variability. We also determine the value of the extinction-insensitive parameter VV-I for RR Lyr stars in fields with different galactic longitude l and compare with values of VV-I calculated for red clump stars by Stanek et al. (1994). The observed and free from interstellar extinction mean brightness and V-I color of RR Lyr stars are also presented.