Left panel: Chandra 0.5–2 keV image (2′ × 2′), smoothed with csmooth (see text) and centered at the QSO position. North is up and east is to the left. Green circles mark point-like sources X-ray detected in the soft band. Units on the colorbar are counts per pixel. Central panel: 2′ × 2′ image of the exposure map computed at 1.4 keV and centered at the QSO position. The green 460 arcsec² region is the one used to extract the net counts of the diffuse emission southward on the QSO in the un-smoothed image, and it lays in the most sensitive peak of the exposure map. The four green dashed circles are the regions used to extract the background. Units on the colorbar are cm² s per pixel. Right panel: XMM-Newton-pn image in the 0.5–2 keV band (2′ × 2′), centered at the QSO position. Units on the colorbar are counts per pixel.