Surface-brightness profiles versus radius for the BCG Mrk 5. 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. Black (grey) diamonds and error bars mark measured B-band values of C01 (C05). The black (grey) dotted line shows the best-fit Sérsic-type model of C01 (C05); the black line is difficult to see, as it falls atop the B-band model line. The dash-tripple-dotted line shows the fitted profile of Amorín et al. (2009).