Mosaic radio images at 383 MHz of the A21-G114.9 clusters pair, with overlaid X-ray ROSAT contours. Left panel: high-resolution (15″ × 5″) mosaic image with σ_rms = 40 μJy beam⁻¹ produced with Briggs robust = 0, showing the compact sources in the field. Right panel: low-resolution (40″ × 40″), compact source-subtracted image with σ_rms = 230 μJy beam⁻¹. It is generated by Briggs robust=0 and a Gaussian uv-taper. No diffuse emission is revealed.