Left: WSRT 1382 MHz image of A746. Contour levels are drawn as in Fig. 1. Black dotted lines indicate the integration areas for the flux measurements. Discrete sources embedded in the diffuse emission are alphabetically labeled, see Table 3. Right: A746 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 natural weighted image convolved to a resolution of 60″. Compact sources were subtracted and contours are drawn at levels of  [1,2,4,8,...]  × 0.4 mJy beam^-1. Dashed contours show the galaxy iso-density distribution derived from the SDSS survey. Contours are drawn at  [1.0,1.4,1.8,...]  × 0.6 galaxies arcmin^-2 selecting only galaxies with 0.16 < z_phot < 0.29.