Deconvolution accuracy of the moment sizes for the Gaussian sources (Eq. (8)), separated from the flat background ℬ, for background over-subtraction levels 0 ≤ ϵ_l ≤ 0.3 and from the convex and concave backgrounds ℬ_𝒢jk±, for background size factors 1 ≤ ƒ_k ≤ 2 (right). The ratios of the deconvolved sizes D_j and C_j to the true model size M (Table 1) are plotted as functions of the model and source resolvedness R_j and . For reference, the thin black curves display D_j/M from panels a and b and the dashed curves visualize (O_j/2)/M for ϵ_l = {0, 0.3}. The dashed vertical lines divide the horizontal axis into the unresolved, partially resolved, and resolved domains (Eq. (11)). All curves for ϵ_l > 0 in panels b and d are shifted to the left in comparison with panels a and c because the resolvedness is underestimated (). The deconvolution errors in panel e for the convex case with ƒ_k ≥ 1.54 reach the values of 24, 29, 34, and 41. Corresponding plots for the deconvolved half maximum sizes are presented in Fig. 5.