Spectral index, LOFAR, and VLA radio surface brightness (I_R), and Chandra X-ray surface-brightness (I_X) trends along the head-tail radio galaxy. Radio surface brightnesses and spectral indexes were computed from LOFAR and VLA C-array images with a beam of 15″ × 15″. Measurements were performed in the cyan beam-sized circular regions reported in the right panel, which depicts the same LOFAR high-resolution image of Fig. 6 for visualization purposes only (the beam is shown in the bottom left corner). Regions are numbered from 0 (head of the tail) to 20 (last region where the VLA emission is > 3σ). The red dashed vertical line on the left panels denotes the location of the arc-shaped cold front.