Top row: Stokes I dirty image before subtraction of the diffuse structure (left panel), the diffuse model obtained with multi-scale CLEAN (middle panel), and the residual Stokes I image after subtraction of the CLEAN model (right panel). Bottom row: same as the top row, but with the shapelet decomposition technique to model the diffuse structure. These images were produced using Briggs +0.5 and u ≤ 120 baselines with a Gaussian taper of 30′.