Self-subtraction residual maps for HD 9672, HD 10647, HD 15115, and HD 32297. The plots show their images (left), rotation-subtraction residuals (centre left), and mirror-subtractions along the minor and major axes (centre right and right, respectively). Residual maps show the 3σ image emission contour (black), and ±3 $\sqrt{2}$ × σ and 5 $\sqrt{2}$ × σ residual emission contours (grey and red respectively for negative and positive). The colour scale ranges from ±5σ of the rms in the residual maps. Beams are shown in the lower left of each panel, and 50 au scale bars are shown on the lower right of the left panel. We present the primary beam-corrected contours of the rotation self-subtraction residuals on the left panel to highlight where these arise from in the image plane for HD 9672, HD 15115, and HD 32297, and from the minor axis self-subtraction residuals for HD 10647.