1D radio surface-brightness profile. Left panel: medium resolution (15″ × 15″) source-subtracted image at 144 MHz. Masked regions are shown in red, together with the green annuli where the surface brightness has been extracted. The contour levels start at 2σ_rms, where σ_rms = 0.18 mJy beam⁻¹, and are spaced with a factor of . The −3σ_rms contours are red. Right panel: radio surface-brightness profile. The solid line represents the resulting double exponential model, while the single components are plotted as a reference. The central mini-halo component has r_e, 1 = 28 ± 5 kpc, while the second broader component has r_e, 2 = 290 ± 60 kpc. The vertical line indicates R₅₀₀, and the dashed black line indicates the 1σ_annulus detection limit for each annulus.