Exposure maps and Fe, Cu counts map for the A3266 cluster. Top panel: Total exposure time (s) in the 0.5–9.25 keV energy range. Middle panel: Normalized Fe-K count map, showing the number of counts in each 1.59 arcsec pixel in the Fe-K complex with the instrumental Cu ring included to indicate the regions in which the redshift can be measured. Bottom panel: Normalized background Cu count map, showing the number of counts in each 1.59 arcsec pixel in the Cu Kα line energy range.