Light distribution in the 4−8 keV band. (a) The 4−8 keV projected light profiles along the major axis taken from the strips shown in Fig. 9. (b) The profiles along the minor axis. (c) These two panels show the same profiles but standardised for a comparison of their shapes. (d) The 4−8 keV diffuse emission image, constructed by two-dimensional interpolation from the point source masked image. Each pixel has an ≈2 × 2 arcsec² size and the colour bar indicates the brightness scale in units of counts per pixel.