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The Optical Gravitational Lensing Experiment. Difference Image Analysis of LMC and SMC data. The Catalog
K. Zebrun, I. Soszynski, P. R. Wozniak +6
We present the first edition of a catalog of variable stars found in the Magellanic Clouds using OGLE-II data obtained during four years: 1997-2000. The catalog covers about 7 squa…
The Optical Gravitational Lensing Experiment. Difference Image Analysis of LMC and SMC data. The Method
K. Zebrun, I. Soszynski, P. R. Wozniak
We describe the Difference Image Analysis (DIA) algorithms and software used to analyze four years (1997-2000) of OGLE-II photometric monitoring of the Magellanic Clouds, the calib…
The Optical Gravitational Lensing Experiment. Cepheids in the Galaxy IC1613: No Dependence of the Period--Luminosity Relation on Metallicity
A. Udalski, L. Wyrzykowski, G. Pietrzynski +5
We present results of the search for Cepheids in the galaxy IC1613 carried out as a sub-project of the OGLE-II microlensing survey. 138 Cepheids were found in the 14.2x14.2 arcmin…
Optical Gravitational Lensing Experiment. OGLE-1999-BUL-32: the Longest Ever Microlensing Event -- Evidence for a Stellar Mass Black Hole?
Shude Mao, Martin C. Smith, P. Wozniak +5
We describe the discovery of the longest microlensing event ever observed, OGLE-1999-BUL-32, also independently identified by the MACHO collaboration as MACHO-99-BLG-22. This uniqu…
Difference Image Analysis of the OGLE-II bulge data. II. Microlensing events
P. R. Wozniak, A. Udalski, M. Szymanski +4
We present a sample of microlensing events discovered in the Difference Image Analysis (DIA) of the OGLE-II images collected during 3 observing seasons, 1997--1999. 4424 light curv…
Optical Gravitational Lensing Experiment. OGLE 2000-BUL-43: A Spectacular Ongoing Parallax Microlensing Event. Difference Image Analysis
I. Soszynski, K. Zebrun, P. R. Wozniak +7
We present the photometry and theoretical models for a Galactic bulge microlensing event OGLE-2000-BUL-43. The event is very bright with I=13.54 mag, and has a very long time scale…