Images illustrating steps in the data cleaning on a sub-image of Field 1. From left to right: the initial image, which includes the spike of PQ Tau close to the image edge to the left; the image after the spike from PQ Tau and the in-field stars have been subtracted via the ePSF method (four stars mostly in the top half of the image); the subsequent image obtained by masking the cores of the point sources; the same region after we mask all pixels that correspond to galaxies, faint stars, and hot pixels; and the diffuse emission map.