A possible dying radio galaxy in Abell 548B. Left: diffuse emission filtered 25″ resolution MGCLS Stokes-I intensity image of Abell 548B (orange) overlaid on the false-colour gri-composite Pan-STARRS image. Previously misidentified structures (see Sect. 7.6.2 for details) are revealed to be a diffuse or dying radio galaxy to the north and a tailed radio galaxy to the south. The brightness scale is logarithmic, saturating at 1 mJy beam⁻¹. Radio sources A–D have clear optical counterparts, with B the likely host of the diffuse lobes and A a spiral galaxy embedded in the eastern lobe. Top right: zoomed-in view of the boxed region around sources A and B. White contours, showing the 15″ resolution MGCLS Stokes-I intensity at levels of (0.3, 0.35, 0.5) mJy beam⁻¹ and edited for clarity, indicate tailed emission associated with the spiral galaxy, A. Red compact structures are from VLASS (Lacy et al. 2020) at 3 GHz with a resolution of 2.9″ × 1.8″ (p.a. 50°). The single VLASS component associated with A has a peak flux of 30 mJy beam⁻¹. There is a small double VLASS source associated with B, with a peak flux of 3.3 mJy beam⁻¹, indicating possible recent radio activity. Bottom right: zoomed-in view at full resolution (7.4″ × 7.4″) of the boxed region around the tailed source, D. The brightness scale is non-monotonic, and the peak brightness in the frame is 7 mJy beam⁻¹. 100″ corresponds to 84 kpc at the cluster redshift of 0.042.