Left: XMM-Newton 0.7–2 keV-band residual map obtained by subtracting the best-fit β-model for the data from the image shown in Fig. 4. Right: XMM-Newton 0.7–2 keV-band filtered with the Gaussian Gradient Method with σ = 3 pixels (1 pixel is 2 arcsec). The 3σ LOFAR contour at 144-MHz with 5.57 arcsec × 8.09 arcsec resolution is overlaid. Yellow lines in the right panel show the sectors used to extract the profiles shown in Fig. 10. A dashed circle indicates the approximate distance of the E and S brightness discontinuities from the X-ray emission peak, equal to ∼2 arcmin.