Gaia Data Release 1
Open Access

Fig. 9


Density of sources in the secondary data set of Gaia DR1: a) all 1141 million sources in the secondary data set; b) the 685 million sources in common with the IGSL; c) the 456 million new sources. These maps use an Aitoff projection in Galactic coordinates, with origin l = b = 0 at the centre and l increasing from right to left. Mean densities are shown for sources in cells of about 0.84 deg2.

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