Simulated radial profiles of the X-ray surface brightness I_X in the 0.5–4 keV and 4–8 keV bands, calculated from the density and temperature radial profiles modified by the propagating spherical shock in the Perseus Cluster (see Fig. 6b). The unperturbed profiles are shown with black dashed curves. Left: shock at 15 kpc from the bubble centre. Right: shock at 60 kpc.