Optical images (greyscale; 35″ on the side) of potential supercluster member galaxies also detected at 3 GHz within the VLA-XXL data, overlaid with magenta radio contours. The contours start at 2σ (1σ = 10.8 μJy) and increase in steps of 2σ for all sources except source 75 where they increase in steps of 4σ. Dashed negative contours are shown at the same levels as the positive. Cyan crosses show the position of the of the VLA radio sources, orange squares represent the position of the optical counterpart. The VLA-XXL-N source IDs are shown above each panel. North is up, east is left.