Galactic Bulge Microlensing Events with Clump Giants as Sources
  We present preliminary results of the analysis of 5 years of MACHO data on the Galactic bulge microlensing events with clump giants as sources. In particular, we discuss: 1) the selection of `giant' events, 2) distribution of impact parameters, 3) distribution of event durations, 4) the concentration of long duration events in MACHO field 104 centered on (l,b) = (3.1,-3.0). We report the preliminary average optical depth of (2.0 +/- 0.4) x 10^{-6} (internal) at (l,b) = (3.9,-3.8). We discuss future work and prospects for building a coherent model of the Galaxy. 
P. Popowski, C. Alcock, R.A. Allsman, D.R. Alves, T.S. Axelrod, A.C.   Becker, D.P. Bennett, K.H. Cook, A.J. Drake, K.C. Fre...