Histograms for each epoch show the distribution of photometry collected in 2.4 pixel diameter apertures spread across an arc at the same radius as Fomalhaut  b. The azimuths of the apertures were selected to be interior to the dust belt. Values were aperture corrected and background subtracted. Overplotted in dotted lines are the Gaussian distribution with mean and standard deviation taken from the samples. The dashed vertical line shows the resulting photometry at the location of Fomalhaut  b.