Position–velocity profiles of stars in the combined reference frame of OBP-near (blue points) and Briceño-1 (red points). Each panel shows the position–velocity profile for a given Cartesian component. Regression lines (orange) are fit to the combined profiles of OBP-near and Briceño-1 in order to estimate the expansion slope, κ, which is quoted in the legends. Individual velocity errors are displayed, and the mean of the position errors is shown in the lower right corner of each panel.