A2256 61–67 MHz images represented in grey scale and contour form. The synthesized beams are shown in the bottom left corner. Left: high-resolution, 22″ × 26″, image made with robust =–0.1 weighting. The radio relic (source G and H) is indicated with the dashed ellipse. Contour levels are drawn at  [1,2,4,...]  × 30 mJy beam^-1. Negative 3σ_rms contours are shown by the dotted lines. Right: low-resolution image, 52″ × 62″, image made with robust =0.5 weighting. The area for the halo spectral index measurement is indicated by the dotted lines. Contour levels are drawn at  [1,2,4,...]  × 75 mJy beam^-1.