Resolved synchrotron spectrum maps accompanying Fig. 6. We constructed the synchrotron slope between the images of Fig. 6 and images with the same resolution at 1.4 GHz by fitting a single power law between the respective pixel values. We impose a surface brightness cutoff for the slope construction, similar to the one in Fig. 6 and also cut pixels with slopes α < −3. The lowest row shows histograms of the pixels in the spectral slope maps. Solid lines are simple histograms, dotted lines are synchrotron flux-weighted histograms. The grayed-out area indicates spectral slopes that are too flat for the standard DSA picture.