Comparing aperture corrections for a single radial surface brightness profile. Left panels: the effect of the aperture correction described by MM2015. The black line shows the unaltered surface brightness profile for NGC 720, while the gray line shows the same profile after the aperture correction is applied. Bottom left panel: the difference between the two (unaltered−corrected). Right panels are the same as the left panels but show our more robust aperture correction using GALFIT models (see Sect. 3.2). We derived all magnitudes and related quantities using the MM2015 correction, to maintain consistency with that study; however, for any future analysis using our data sets, we recommend instead using the revised correction.