RM map in $\mathrm{rad}{\mathrm{m}}^{-2}$ at 30″ resolution for the north (top) and south (bottom) relics. Overlaid are the polarization electric field vectors in black, corrected for the galactic RM. The gray contour levels are drawn at −3σ_rms, 3σ_rms, and then increase by a factor of two, where ${\sigma }_{\mathrm{rms}}=15\mathrm{\mu }\mathrm{Jy}{\mathrm{beam}}^{-1}$. Only pixels above 6σ_P are shown, with σ_P being evaluated pixel by pixel using the external range of their Faraday spectra.