Sky distribution of the Gaia-CRF3 sources. The plot shows the density of sources per square degree computed from the source counts per pixel using HEALPix of level 6 (pixel size ≃0.84 deg²). The magnitude distribution and further properties of the sources are shown on Fig. 6. This full-sky map uses a Hammer-Aitoff projection in galactic coordinates, with l = b = 0 at the centre, north up, and l increasing from right to left.