backPlanetary and Low-Luminosity Object Transits
We present results of an extensive photometric search for planetary and low-luminosity object transits in the Galactic disk stars commencing the third phase of the Optical Gravitational Lensing Experiment - OGLE-III. Photometric observations of three fields in the direction of the Galactic center (800 epochs per field) were collected on 32 nights during time interval of 45 days. Out of the total of 5 million stars monitored, about 52000 Galactic disk stars with photometry better than 1.5% were analyzed for flat-bottomed eclipses with the depth smaller than 0.08 mag.
Altogether 46 stars with transiting low-luminosity objects were
detected. For 42 of them multiple transits were observed, a total of 185,
allowing orbital period determination. Transits in two objects: OGLE-TR-40 and
OGLE-TR-10, with the radii ratio of about 0.14 and estimate of the
radius of the companion 1.0-1.5 RJup, resemble the well known
planetary transit in HD 209458. All transits' data are presented in
THIS TABLE.
Full desription of this project and its
results can be found in the paper Udalski et al. 2002,
Acta Astron., 52, 1
(astro-ph/0202320).
The transiting objects may be Jupiters, brown dwarfs, or M dwarfs. Future determination of the amplitude of radial velocity changes will establish their masses, and will confirm or refute the reality of the so called "brown dwarf desert". The low mass stellar companions will provide new data needed for the poorly known mass-radius relation for the lower main sequence.
All PHOTOMETRIC DATA, LIGHT CURVES AND FINDING CHARTS are available via THIS LINK.
PLEASE cite the following paper when using the data or referring to these OGLE results: Udalski et al., 2002, Acta Astron., 52, 1.