Surface-brightness profiles versus radius for the BCG ESO 400-G043. Panels, lines, and coloured bullets are as described in Fig. 2. The I-band profiles are offset by −1.5 mag arcsec^-2 from the B-band profiles for increased visibility. Grey and black bullets and error bars mark measured B-band (BÖ02) and V-band (M13a) values, respectively. The grey dotted (dashed) line shows the best-fit Sérsic-type model (exponential fit to the disc in the range 16 <r< 32″) of BÖ02. The black dotted line shows the best exponential fit to the disc of M13a (for 24 ≤ μ_V ≤ 26 mag arcsec^-2).