Composite images of MACS0025. Top panel: colour image is X-ray surface brightness as per Fig. 3. Bottom panel: colour image is HST image of the cluster centre (proposal 10703, P.I. H. Ebeling). Cyan boxes identify optical hosts for the compact radio sources. In both panels, contours are 325 MHz GMRT data, imaged with an AIPS ROBUST −1.0, at levels [1, 2, 4, 8, 16, 32, 64] ×5σ_FR where σ_FR = 81 μJy beam^-1. The −5σ contour is presented in gray. The synthesised beam is 10.1 × 8.3 arcsec at PA 51.1°, indicated by the unfilled ellipse in the lower-left corner.