Hess diagram, relative differences, and χ² distribution (top to bottom) of the best-fit halo in TRILEGAL for parameter set 5. The upper panel is the Hess diagram of the halo of set 5. The white thick lines enclose the triangle mentioned in Fig. 6. The two lower panels are the relative difference and χ² distribution restricted in the halo area. The coding is the same as in the rows of Fig. 5. (A colour version is available on-line.)