Figure 4: Flux-correction factor as a function of off-axis angle for three different azimuthal angles: (a) =0 degrees, (b) = 22.5 degrees, and (c) = 45 degrees. The pixel numbers correspond to those in the upper left panel in Figure 3, where the source pixel is typically pixel 1, pixel 0 is the central pixel, and pixels 2 and 3 are generally farthest from the source position.