The OGLE-III Catalog of Variable Stars

III. RR Lyrae Stars in the Large Magellanic Cloud

The third part of the OGLE-III Catalog of Variable Stars comprises 24 906 RR Lyr stars in the Large Magellanic Cloud (LMC). This sample consist of 17 693 fundamental-mode (RRab), 4958 first-overtone (RRc), 986 double-mode (RRd) and 1269 suspected second-overtone (RRe) pulsators. 66 objects are foreground Galactic RR Lyr stars. The catalog data include basic photometric and astrometric properties of the RR Lyr stars, multi-epoch VI photometry and finding charts.


We detected one new RR Lyr star with additional eclipsing variations. The spatial distribution of RR Lyr stars in the LMC is distinctly non-spherical and it is elongated in the same direction as the LMC bar. The basic statistical features of RR Lyr stars in the LMC are provided. The apparent V-band magnitudes for RRab stars have the modal value of 19.36 mag, and for overtone RR Lyr stars it is equal to 19.32 mag. The mean periods for RRab, RRc and RRe stars are 0.576, 0.337 and 0.270 days, respectively.

Spatial distribution

The OGLE-III Catalog of RR Lyr stars in the LMC is available from the OGLE Internet archive. See README file there for details.

PLEASE cite the following paper when using the data or referring to these OGLE results:
Soszyński et al., 2009, Acta Astron., 59, 1 (astro-ph/0903.2482)

Any comments about the data and the form of their presentation are welcome as they can improve the future releases of catalogs of variable stars detected by the OGLE collaboration. Send your messages to this address.