Fig. 23.
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Distribution Galactic coordinates (Hammer–Aitoff projection) of the 1 897 754 sources from the astrometric selection (i.e. sources in the qso_candidates table with astrometric_selection_flag set). The plot shows the density of sources per square degree computed from the source counts per pixel at HEALPix level 7 (pixel size ≃0.21 deg2).
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