Histogram of signal-to-noise ratio for pixels located within the effective area of the Jackpot map (blue) and the corresponding jackknife map (yellow). The solid vertical line represents the 2.5σ cut used in our simulations. The dashed line represents the threshold of 4σ above which we catalog sources. We note that the excessive negative signals compared to the jackknife map are a result of matched filtering, which can be properly accounted for during source extraction processes using a correct PSF.