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The Optical Gravitational Lensing Experiment. Follow-Up Observations of the Macho Microlensing Event in the Galactic Bulge
M. Szymanski, A. Udalski, J. Kaluzny +3
We present follow-up observations of a gravitational microlensing candidate found by the MACHO collaboration in the Galactic bulge. The photometric data cover a period near the max…
The Optical Gravitational Lensing Experiment. Deep Photometry of the Sagittarius Dwarf Spheroidal Galaxy
Mario Mateo, A. Udalski, M. Szymanski +3
We present deep CCD photometry of a field in the newly discovered dwarf spheroidal galaxy in Sagittarius (hereafter Sgr), and of a nearby control field. These data (totaling ~3.5 h…
The Optical Gravitational Lensing Experiment. the Early Warning System
A. Udalski, M. Szymanski, J. Kaluzny +4
The discoveries of 17 microlensing event candidates have been reported over the last year by three teams conducting unprecedented mass photometric searches in the direction of the…
The Optical Gravitational Lensing Experiment. OGLE #7: Binary Microlens or a New Unusual Variable?
A. Udalski, M. Szymanski, S. Mao +5
We present the light curve of an unusual variable object, OGLE #7, detected during the OGLE search for microlensing events. After one season of being in a low, normal state, the st…
Are the Ogle Microlenses in the Galactic Bar?
B. Paczynski, K. Z. Stanek, A. Udalski +5
The analysis of the first two years of OGLE data revealed 9 microlensing events of the galactic bulge stars, with the characteristic time scales in the range day…
Color-Magnitude Diagram Distribution of the Bulge Red Clump Stars - Evidence for the Galactic Bar
K. Z. Stanek, M. Mateo, A. Udalski +3
The color-magnitude diagrams of stars obtained for 13 fields towards the Galactic bulge with the OGLE project reveal a well-defined population of bulge red clum…
The Distribution of Galactic Disk Stars in Baade's Window
B. Paczynski, K. Z. Stanek, A. Udalski +4
The color-magnitude diagram of stars obtained for Baade's Window towards the Galactic bulge with the OGLE project reveals a surprisingly narrow main sequence…