The 110 μm continuum residual map (coloured contours) of IRS7 overplotted on the H₂CO 3₀₃ → 2₀₂ emission (greyscale) from SMA+APEX observations (Lindberg & Jørgensen 2012). The orange dots show the PACS spaxel centres. Contour levels are at 5 Jy intervals and go from light blue to dark blue as the level of emission increases (i.e. the residual emission is at a minimum near the centre of the figure). The red dashed lines illustrate our definition of the two extended (residual) ridge regions (Res N-c and Res S-c) in IRS7 continuum. The crosses show the point sources used for the deconvolution.