EDP Sciences
Gaia Data Release 2
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Fig. 12

image

Map of the median parallaxes for the full quasar sample, showing large-scale variations of the parallax zero point. See Fig. 5 for the coordinate system and density of sources. Median values are calculated in cells of about 3.7 × 3.7 deg2. Only cells with |sinb | > 0.2 are plotted.

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