The Optical Gravitational Lensing Experiment.
Search for Planetary and Low-Luminosity Object Transits in the Galactic Disk.
Results of 2001 Campaign - Supplement
A. Udalski1, K. �ebru�1, M. Szyma�ski1,
M. Kubiak1, I. Soszy�ski1,
O. Szewczyk1, �. Wyrzykowski1,
and G. Pietrzy�ski2,1
1Warsaw University Observatory, Al. Ujazdowskie 4,
00-478 Warszawa, Poland
e-mail:
(udalski,zebrun,msz,mk,soszynsk,szewczyk,wyrzykow,pietrzyn)@astrouw.edu.pl
2 Universidad de Concepci�n, Departamento de Fisica,
Casilla 160-C, Concepci�n, Chile
Received: June 20, 2002
ABSTRACT
The photometric data collected during 2001 season OGLE-III planetary/low
luminosity object transit campaign were reanalyzed with the new transit
search technique - the BLS method by Kovacs, Zucker and Mazeh. In addition
to all presented in our original paper transits, additional 13 objects with
transiting low-luminosity companions were discovered. We present here a
supplement to our original catalog - the photometric data, light curves and
finding charts of all 13 new objects.
The model fits to the transit light curves indicate that a few new objects
may be Jupiter-sized (R<1.6 RJup). OGLE-TR-56 is a
particularly interesting case. Its transit has only 13 mmag depth,
short duration and a period of 1.21190 days. Model fit indicates that the
companion may be Saturn-sized if the passage were central.
Spectroscopic follow-up observations are encouraged for final
classification of the transiting objects as planets, brown dwarfs or late
M-type dwarf stars.
We also provide the most recent ephemerides of other most promising
planetary transits: OGLE-TR-10 and OGLE-TR-40 based on observations
collected in June 2002.
All photometric data are available to the astronomical community from the
OGLE Internet archive.
Key words:
planetary systems - Stars: low-mass, brown dwarfs -
binaries: eclipsing
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