Proper motion in RA for the DANCe (x-axis) and Tycho (y-axis) catalogs. The error bars represent the estimated error for the DANCe measurements and the reported uncertainty in the case of the Tycho measurement. The left panel corresponds to sources with V_T < 11.5 mag, the right panel to sources with V_T > 11.5 mag. A dashed line corresponding to a linear relation is represented to guide the eye. A similar distribution is found in declination.