Left: original 1.4 GHz radio image from Dubner et al. (1998) (pixel size = 6.75′′, ang. resolution = 55′′), middle: prepared input model image scaled to the approximate total flux density of 230 Jy (1024 × 1024 with pixel size of 13.5′′), and right the dirty image obtained with dataset B. All emission falling outside the extended emission of W50 was set to zero, but point sources inside W50 were kept in the simulation.