Four examples showing time series of sample 11 × 11 pixel stamp images centered on a star. In each case a PSPL microlensing light curve with parameters u₀ = 0.1, t₀ = 2160, t_E = 400 minutes has been injected directly into the stellar flux before image simulation. The top row of each panel shows the direct simulated images. The central rows are difference images, and the bottom rows are the same as the central rows, but after subtraction of the fitted PSF. Pixels that are saturated in the direct images are colored orange. Light curves from the complete sets of images are shown in Figure 6. The images shown here are at times 0, 1950, 2100, 2160, 2220, 2370, 2865 minutes.