Data Mining the OGLE-II I-band Database for Eclipsing Binary Stars

摘要

The OGLE I-band database is a searchable database of quality photometric data available to the public. During Phase 2 of the experiment, known as "OGLE-II", I-band observations were made over a period of approximately 1,000 days, resulting in over 1010 measurements of more than 40 million stars. This was accomplished by using a filter with a passband near the standard Cousins I_c. The database of these observations is fully searchable using the mysql database engine, and provides the magnitude measurements and their uncertainties. In this work, a program of data mining the OGLE I-band database was performed, resulting in the discovery of 42 previously unreported eclipsing binaries. Using the software package peranso to analyze the light curves obtained from OGLE-II, the eclipsing types, the epochs, and the periods of these eclipsing variables were determined, to one part in 10~6. A preliminary attempt to model the physical parameters of these binaries was also performed, using the binary maker 3 software.