Comparison of Deep-SANNE refined image. (a) Deep-SANNE refined image of the observational data (shown in Fig. 6b) convolved with the clean beam corresponding to the observation. The FWHM of the clean beam is marked in the lower left corner. (b) Difference between the convolved Deep-SANNE refined image (panel (a)) and the observational image (Fig. 6a). (c) Observational image (Fig. 6a) deconvolved with the clean beam in the 2D spatial domain, using a standard Richardson-Lucy algorithm.