OPTICAL GRAVITATIONAL LENSING EXPERIMENT
OGLE
Catalog of Candidate Variable Stars in the Galactic Bulge
from Difference Image Analysis
The current version of the catalog contains over 220,000 I band light curves,
basically entire output of the DIA pipeline. The details can be found
in the
postscript paper
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NEW DATA!
Extended light curves covering all four OGLE2 seasons are now available
for *the same variables as before* detected using difference frames from 1997-1999.
In particular the DIA centroid is the same as before and does not use new
information from frames taken in 2000. Reference images are also the same.
The fourth season makes insignificant difference for detecting continuous
variability, but the present sample misses transient objects from 2000.
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Data distribution:
The data can be accessed from the
OGLE
ftp archive or requested on a DAT tape. For your copy of a DAT tape
with the entire catalog please contact Prof. Bohdan Paczynski:
email: bp@astro.princeton.edu, mail: Princeton University Observatory,
Princeton, NJ 08544, USA.
This work is still preliminary. It will be gradually cleaned of
artifacts and fully calibrated after adding the data for the year of 2000.
About 10% of the objects are actually spurious detections.
Most fields are calibrated to about 0.05 mag by matching to
the OGLE DoPhot database, however for 10 fields
(BUL_SC: 7, 9, 20, 25, 28, 32, 43, 47, 48 and 49) only rough calibration
was available at the time of this analysis. Zero points for those fields
can be off by as much as 0.25 mag and cannot be used in distance
estimates. Nevertheless, the data should find numerous applications including
the work on classification of variables and cross identifications with
catalogs of objects detected in other spectral bands.
PLEASE cite the following paper when using the data or referring
to these OGLE results: Wozniak et al. (2002), Acta Astron., 52,
129.
wozniak@lanl.gov
Last modified: Tue Jan 15 17:11:20 2002