Left: GMRT 325 MHz radio contours of A 2744 at the full resolution of 15.9′′ × 8.5′′, p.a. 38°, overlaid on the POSS-2 red image. The 1σ noise level is 0.15 mJy beam^-1. Red contours start at 0.5 mJy beam^-1 and then scale by a factor of 2. Dashed, black contours correspond to the − 3σ level. Individual radio galaxies are labelled from S1 to S4. Right: low resolution (35.0′′ × 35.0′′, p.a. 0°) radio contours overlaid on the smoothed Chandra X-ray image. The 1σ noise level in the radio image is 0.35 mJy beam^-1. White contours start at 1 mJy beam^-1 and then scale by a factor of 2. The − 3σ level is shown as dashed, red contours.