Fig. 22
Differential astrometry for common proper motion pairs shown in the sense primary minus secondary component. Top: differences between parallaxes (mas, running medians over 3000 sources) before (blue) and after (magenta) zero point correction, as a function of the primary magnitude, 10 < G < 15 mag. Middle: primary minus secondary parallaxes before and after zero point correction for stars brighter than G = 10 mag (running medians over 100 sources). Bottom: differential proper motion (mas yr−1) in right ascension (blue) and declination (orange) versus magnitude, running medians over 3000 sources.
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