A simulated stamp is shown in the left panel. In the right three panels, the power spectrum for each of the three cut-out sizes are shown. The power spectrum of the original image is plotted with a blue solid line, while the average power spectrum for 200 shuffled versions of the stamp is plotted with an orange dashed line. The KS statistic for each cut-out size is shown in the bottom right hand side of each power spectrum panel. Top: A simulated stamp with pure Gaussian random noise. The stamp has a root mean square (RMS) of 1. The KS statistic for the 15x15 cut-out is less than 0.5, so this stamp would be considered a hostless candidate. Bottom: A simulated stamp with an injected host. The simulated host has a peak amplitude of 2.3 units and is injected into a background of Gaussian random noise with an RMS of 1. Because the KS statistic is greater than 0.5, the host is successfully detected.