Effective convergence, κ_eff, of the iso_halo model for the SN Encore redshift (z = 1.949). The total κ_eff distribution (in grey) near the cluster core (inner ∼10″ region) is dominated by the primary DM halo and the BCG, and κ_eff follows roughly the observed BCG and galaxy intensity distribution. The extension of the contour level with κ_eff = 0.6 towards the southwest part of the BCG is due to the presence of the perturbative DM halo located around (x_DM2, y_DM2)∼(20″, −20″), for which we show its position in blue with its 1σ uncertainty. The green contours show the κ_eff of only the main DM halo, the red contours show κ_eff for the main and perturbative halo combined, which highlights the deformation of the overall κ_eff due to the perturbative halo.