Examples of BIC false positives (i.e. ΔBIC > 0 but no nucleus). We show the images (left) and residuals based on the multi-component model without (centre) and with (right) a nucleus component. The white regions denote masked regions. The images in the first column have widths of 4R_e and surface brightness limits from 18–27 mag arcsec², whereas the residual images have widths of 20 arcsec and are limited from –1 to 1 mag arcsec² in surface brightness. The red circles have a radius of the average PSF FWHM × 2. The galaxy stellar masses are annotated in the first column.