Pixel mask for the Q3 data of KIC 6352430, plotted in a similar manner to Fig. 9, and cut in two parts for better visibility. We have not used the blue pixels (not enough flux, typically around bright stars where the overflow from saturated pixels was less than expected) but have added the yellow pixels (significant signal is present) in our custom mask for the light curve extraction. Red pixels were flagged as being contaminated by flux from a background star and were not used despite the high flux level, while black pixels have too many NaN values.