The Optical Gravitational Lensing Experiment. Follow-Up Observations of   the Macho Microlensing Event in the Galactic Bulge
  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 maximum of the event and may be used to construct complete light curve. The position of the lensed star in the color magnitude diagram suggests that it is a Galactic bulge star located on the subgiant branch. 
M. Szymanski, A. Udalski, J. Kaluzny, M. Kubiak, W. Krzeminski and M.   Mateo