5 papers
The Optical Gravitational Lensing Experiment. Investigating the Influence of Blending on the Cepheid Distance Scale with Cepheids in the Large Magellanic Cloud
K. Z. Stanek, A. Udalski
We investigate the influence of blending on the Cepheid distance scale. Blending leads to systematically low distances to galaxies observed with HST, and therefore to systematicall…
UBVI Color-Magnitude Diagrams in Baade's Window: Metallicity Range, Implications for the Red Clump Method, Color ``Anomaly'' and the Distances to the Galactic Center and the Large Magellanic Cloud
K. Z. Stanek, J. Kaluzny, A. Wysocka +1
(Abridged) We analyze the UBVI color-magnitude diagrams towards the Galactic bulge in a relatively low-reddening region of Baade's Window. The dereddened red giant branch is very w…
The Optical Gravitational Lensing Experiment. The Catalog of Periodic Variable Stars in the Galactic Bulge. V. Periodic Variables in Fields: MM5-A, MM5-B, MM7-A and MM7-B
A. Udalski, A. Olech, M. Szymanski +5
We present the fifth part of the OGLE Catalog of Periodic Variable Stars in the Galactic bulge. 574 variable stars: 44 pulsating, 369 eclipsing and 161 miscellaneous type were dete…
Modelling the Galactic Bar Using Red Clump Stars
K. Z. Stanek, M. Mateo, A. Udalski +4
The color-magnitude diagrams of stars obtained for 19 fields towards the Galactic bulge with the OGLE project reveal a well-defined population of bulge red clu…
The Optical Depth to Gravitational Microlensing in the Direction of the Galactic Bulge
A. Udalski, M. Szymanski, K. Z. Stanek +6
We present the analysis of the first two years of the OGLE search for gravitational lenses towards the Galactic bulge. We detected 9 microlensing events in an algorithmic search of…