56 microlensing events in M31. The image shows a wide field (50 × 70 arcmin) from the second Palomar Sky Survey (ESO Online Digitized Sky Survey—DSS-2-blue). The WeCAPP events are plotted in red, POINT-AGAPE events in blue, Belokurov events in cyan, MEGA events in green, AGAPE Z1 event in black, NMS event in magenta, PLAN events in yellow, PAndromeda events in orange, Slott-AGAPE in brown, VATT from Crotts & Tomaney (1996) in violet, and VATT from Uglesich et al. (2004) in black. We note that although our event W8 appears to be on top of the OAB-N2 event in this figure, their t ₀ differ by more than 6.5 years (W8 has a t ₀ of JD = 2452112 and OAB-N2 has a t ₀ of JD = 2454467). In addition, from our difference images their positions differ by 0.5 arcsec.