Fig. 23.

Difference between the fitted and cataloged coordinates of all the UCAC5 stars in our single-exposure plates as a function of the GaiaG-band magnitude after we have modified the values of the declination proper motions given in the UCAC5 catalog. The amount of the additive modification is given as a curved white line in units of 10 mas yr−1. The lower panel is for RA, the upper panel is for declination.
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