1. INTRODUCTION  
2. OBSERVATIONS  
3. DATA ANALYSIS  
4. MICROLENSING EVENT SELECTION  
4.1. Selection Criteria  
4.2. Parallax  
4.4. Final Sample  
5. SHORT EVENTS  
5.1. Short Events in 2006-2007 Sample  
5.2. Refined FSPL Fit for Short Events  
6. FSPL EVENTS  
6.1. Short FSPL Events  
7. DETECTION EFFICIENCY  
7.1. Image Level Simulation  
7.2. Integrated Detection Efficiency as a Function of $t_{\mathrm{E}}$  
8. DETECTION EFFICIENCY FOR FSPL EVENTS  
9. DISCUSSION AND CONCLUSIONS