Exposure map (in Galactic coordinates) of the first all-sky survey by the ART-XC telescope. Exposure time is given in seconds (see the color scale shown on the right). The white spots in the map correspond to the ecliptic poles. Exposure times for eROSITA are approximately three times longer than for ART-XC, in accordance with the instruments’ FoV (36′ and 1.03 °, respectively).