Heliocentric angle at which continuum intensity contrast reaches its maximum, μ_max (top), as well as the contrast, C_IC,max (middle) and specific contrast, C_IC,max/(⟨B_l⟩/μ) (bottom) there, as a function of ⟨B_l⟩/μ. The filled circles represent the values derived from the cubic polynomial fit to the contrast CLV profiles (Fig. 7) and the error bars the uncertainty in C_IC,max and C_IC,max/(⟨B_l⟩/μ). The curves follow the solution from the surface fit to measured continuum intensity contrast (Eq. (3)).