1994, in: IAU Symposium 169, "Unsolved Problems of the Milky
Way"
ed. L. Blitz and P. Teuben, p. 103.
The Optical Gravitational Lensing Experiment (OGLE, Udalski et al.1994a; Paczynski et al. 1994b - these proceedings; and references therein) is an extensive photometric search for the rare cases of gravitational microlensing of Galactic bulge stars by foreground objects. It provides a huge data base (Szymanski and Udalski 1993), from which color-magnitude diagrams have been compiled (Udalski et al.1993, 1994b). Here we discuss the use a of well-defined population of bulge red clump stars to investigate the presence of the bar in our Galaxy. The results of our earlier studies are described by Stanek et al. (1994).
PostScript version available from astro-ph/9410044