Left panel: mosaic pseudo-colour image in 0.4–1.8 keV (red), 1.8–2.8 keV (green), and 2.8–10 keV (blue) energy bands corrected for particle, soft proton, and residual stray-light contamination. The definition of regions used for spectral analysis is also shown. Middle panel: combined exposure map in 0.4–10 keV band where regions most heavily contaminated by stray light and excluded from the analysis can be identified. Right panel: colour-coded absorption column density.