Left: GMRT 325 MHz radio contours of the emission from Z 2661 at the full resolution (10.8′′ × 8.4′′, p.a. − 83°), overlaid on the POSS-2 red image. The 1σ noise level is 0.12 mJy beam^-1. Red contours start at 0.36 mJy beam^-1 and then scale by a factor of 2. Black dashed contours correspond to the − 3σ level. Individual radio galaxies are labelled from S1 to S4. Right: 325 MHz contours at the resolution of 25.0′′ × 25.0′′, p.a. 0°, overlaid on the GMRT 610 MHz image (17.7′′ × 17.4′′) from V08. Red contours start at + 3σ = 0.6 mJy beam^-1 and then scale by a factor 2. The − 3σ level is shown as black dashed contours. The rms noise level in the 610 MHz image is 65 μJy beam^-1.