Distribution of the Gaia-CRF3 sources with five-parameter solutions. 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). This and following full-sky maps use a Hammer–Aitoff projection in galactic coordinates with l = b = 0 at the centre, north up, and l increasing from right to left.