Gaia Data Release 1
Open Access

Fig. 7


Summary statistics for the 2 million sources in the primary data set. The five maps along the main diagonal show, from top-left to bottom-right, the standard uncertainties in α, δ, ϖ, μα, μδ. The ten maps above the diagonal show the correlation coefficients, in the range −1 to + 1, between the corresponding parameters on the main diagonal. All maps use an Aitoff projection in equatorial (ICRS) coordinates, with origin α = δ = 0 at the centre and α increasing from right to left. Median values are shown in cells of about 0.84 deg2.

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