Example images of the four galaxy models used in this paper. The left panels are the DESI-LS images in surface brightness space with the location of the SN marked as the green cross, the centre panels are the fitted galaxy models, where the superellipses are the effective radius for each galaxy component. The shaded regions are computed by linearly mapping the surface brightness profile to the opacity. The central brightness has an opacity of one, while zero opacity is at the 25 mag/arcsec² isophote. The right panels are the residuals, calculated by subtracting the model from the image. The four galaxy models (from top to bottom) are ‘Elliptical’, ‘Bulge+Disc’, ‘Bulge+Bar+Disc’ and ‘Disc-only’.