Fig. 4
Sky distribution of the Gaia-CRF2 source magnitudes. This map shows the median values of the G magnitude in cells of approximately 0.84 deg2 using an equal-area Hammer–Aitoff projection in Galactic coordinates. The Galactic centre is at the origin of coordinates (centre of the map), Galactic north is up, and Galactic longitude increases from right to left.
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