Top: proper motions (μ_tot) and parallaxes (ϖ) for all sources with significant parallaxes. The green line indicates the population of halo stars, the blue line indicates the population of disc stars, and the red lines indicate two sharp populations of obviously erroneous objects. Bottom: proper motions and parallaxes for the cleaned sample. The isolated points with very high proper motion correspond to real stars, for example Proxima Cen (blue), Barnard’s star (red), Kapteyn’s star (green), and HD 103095 (black).