Distribution of eROSITA exposure (upper panel) and sensitivity in the 0.3–2.2 keV energy band (lower panel) after the first three all-sky surveys. The solid curve in the upper panel shows the area of the sky in which the eROSITA exposure exceeded the given value. The solid curve in the lower panel shows the area of the sky in the hemisphere analyzed by the Russian consortium in which the 3σ sensitivity is better than the given value.