Characterizing the starlight distribution of NGC 612: W1 image (left panel) and GALFIT residuals using a single Sérsic model (middle panel) and a Sérsic + exponential disk model (right panel). The contour levels are ± 1μJy/pixel (positive contour in black and negative one in white) and the best-fit parameters are given in Table 5. The Sérsic + exponential disk model gives lower residuals and will be used to represent the starlight distribution of NGC 612 in all WISE bands.