RR Lyr in the OGLE Catalog
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Photometric Parameters of RR Lyr Variable Stars in the Galactic Bulge.
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Photometric Parameters of RR Lyr Variable Stars in the
Galactic Bulge.
Acta Astronomica , 1997, Vol. 47, pp. 183-200
Arkadiusz Olech
Warsaw University Observatory, Al. Ujazdowskie 4, Warszawa, 00-478, Poland
March 12, 1997
Abstract:
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.
PDF version of this paper is available.