Gaia Data Release 1
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Fig. 27

image

Sky distribution of the median zeropoint between the Gaia and SDSS photometric catalogues. The comparison is limited to sources fainter than G = 15 and to sources in the colour range 0.8 < gr < 1.1. The empirical photometric transformations from van Leeuwen et al. (2017) have been used to estimate G magnitudes from g and r. The entire sky in equatorial coordinates is shown on the left, while the plot on the right shows a 3D view centred on the large area outside the Galactic plane covered by SDSS.

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