Eclipsing Binary Stars in the OGLE-III Galactic Disk Fields

We present the analysis of 11 589 eclipsing binary stars identified in twenty-one OGLE-III Galactic disk fields toward constellations of Carina, Centaurus, and Musca.

The binaries have out-of-eclipse brightness between I=12.5 mag and I=21 mag. The completeness of the catalog is estimated at a level of about 75%.

Comparison of the orbital period distribution for the OGLE-III disk binaries with systems detected in other recent large-scale Galactic surveys shows the maximum around 0.40 d and an almost flat distribution between 0.5 d and 2.5 d, indepedent of population.

Among thousands of variables we have found ten doubly eclipsing objects and one eclipsing-ellipsoidal object, of which nine are candidates for quadruple systems. We also identify ten eclipsing subdwarf-B-type binary stars and numerous eclipsing RS CVn-type variables.

Details on the detected objects, V- and I-band photometry, and finding charts are available to the astronomical community from the OGLE Internet archive.

PLEASE cite the following paper when using the data or referring to these OGLE results: Pietrukowicz et al., 2013, Acta Astron., 63, 115 (astro-ph/1306.6324)

Any comments about the data and the form of their presentation are welcome. Send your messages to this address.