Large-FoV source-subtracted images of G279+39. Left: uGMRT 400 MHz image at 16.4″ × 10.8″ resolution with a noise of 44 μJy beam⁻¹. Right: MeerKAT 822 MHz image at 16.8″ × 16.3″ resolution with a noise of 6.3 μJy beam⁻¹ (the same of Fig. 3, top panel). Solid contours are spaced by a factor of 2 from the 3σ_rms level. The −3σ_rms contour is shown in dashed. The beams are shown in the bottom left corners. The color bar units are Jansky beam⁻¹.