Constraints on some relevant model parameters characterizing the two exponential profiles used to describe the continuum emission in terms of half-light radius (R_eff, 1 and R_eff, 2), total magnification factor (μ_tot) and stellar velocity dispersion (strength of the SIS mass distribution) for the two deflectors. For each component, magnification and size are somewhat degenerate with the flux density. Contours are 1-, 2-σ, and 3-σ CL regions. Vertical lines in marginal PDF panels along the diagonal represent the mean and the ±1σ interval around the mean.