Plot for determining the stellar mass. The colours give the masses of the lines ranging from 0.7 M_⊙ (black) in steps of 0.1 M_⊙ to 1.3 M_⊙ (magenta/purple). The different line types are explained in the legend. The shaded areas in the figure indicate where Fig. A.1 should be used instead (bottom) and where the lines are hard to disentangle (top).