PLEASE cite the following paper when using the data or referring to these OGLE results: Zebrun et al. (2001), Acta Astron., 51, 317.
1. The Catalog
Here we present the catalog of the variable stars found in the LMC
and SMC data obtained during four years of OGLE-II project duration
(January 1997 - November 2000).
The variables were found with the Difference Image Analysis (DIA)
software. The catalog is divided into two sections. The DC section contains
FITS reference images (obtained by co-adding 20 best frames for each field)
and DoPHOT photometry of all stars on those images. The AC section
contains light curves in flux and magnitude of over 68000 detected variable
stars. For convenience we present short instruction of catalog usage.
2. The Method
There are basically two methods of analysis of photometric CCD
observations. The first method is implemented in in Daophot (1987)
and DoPHOT packages (1993). This packages use all information about star
flux to measure brightness.
3. The Data
We present the analysis of 21 LMC fields and 11 SMC fields.
The cover 4.62sq.deg and 2.42sq.deg of LMC and SMC respectively.
Typically, there are ~400 I-band data
points, and ~30 V and B-band data points.
The DIA method used only I band OGLE II data. In the I band
we detected in total ~2x10^7 objects. The DIA analysis provided
almost ~7x10^4 candidates for variable stars.
For comparision the catalog contains also the OGLE results of photometry
for I, V and B bands.
4. Inctruction of usage
The catalog main window is divided into two sections. The left panel
contains links to different parts of the catalog. The contents of the left
window can vary depending on the information we want to display.
There are two distinct sections DC and AC of the catalog.
Below there are graphical diagrams showing how to browse through our
If You are not satisfied with this brief information please use one of these references.Stetson, Peter B., 1987, PASP, 99, 191 - Daophot description
Schechter, Paul L., Mateo Mario, Saha Abhijit, 1993, PASP, 105, 1342 - DoPHOT description
Alard, C. and Lupton, R. H. Astroph. Journal 1998 no. 503 page 325 - description of image substraction method
Woźniak, P., 2001, Acta Astron., 44, 227 - description of DIA
Żebruń K. Soszyński I. and Woźniak P. R., 2001, Acta Astron. 51, 303, astro-ph/0110612 - description of DIA (the method used to create this catalog)
Żebruń K. Soszyński I. et. al., 2001, Acta Astron. 51, 317, astro-ph/0110623- the paper describing contents of this catalog
6. Availability of the Catalog
The data presented in this WWW catalog are also available
from OGLE anonymous FTP servers:
We tried to remove all errors and omissions from the catalog. However if
You encounter any problems please send a message to a following e-mail
Now You can enter the Catalog.