Example of the multi-component decomposition performed to the 1D surface brightness profile of the remnant of model gE0gSao16 (E/S0) in the V band. The final galaxy can be well described using a Sérsic bulge, an outer exponential disc, and two additional intermediate Sérsic components (see the legend). The latter ones represent the contribution of a couple of lenses, which can be identified in its V-band images (see Fig. 5). The outer one seems to be spheroidal in the edge-on view in that figure, thus corresponding to a stellar halo. On the basis of this decomposition, we have defined the outer radii of the bulge, the innermost lens, and the outer disc limit of this galaxy (R_bulge, R_lens and R_lim, respectively) as described in the text. The three outer radii have been marked with arrows in the Figure.