Left: CIZA J0107.7+5408 WSRT 1382 MHz image. Contour levels are drawn as in Fig. 1. Black dotted lines indicate the integration area for the flux measurement. Discrete sources embedded in the diffuse emission are alphabetically labeled, see Table 3. Right: CIZA J0107.7+5408 X-ray emission from ROSAT in orange. The original image from the ROSAT All Sky Survey was convolved with a 225″ FWHM Gaussian. Solid contours are from the WSRT 1382 MHz image convolved to a resolution of 40″. Compact sources were subtracted and contours are drawn at levels of  [1,2,4,8,...]  × 0.3 mJy beam^-1. Dashed contours show the galaxy iso-density distribution derived from INT images. Contours are drawn at  [1.0,1.2,1.4,...]  × 0.3 galaxies arcmin^-2 selecting only galaxies with colors 0.85 < V − R < 1.15, 0.6 < R − I < 0.9, i.e., within 0.15 mag the V − R and R − I color of the central cD galaxy.