Scatterplot of variable sources in the proper motion plane. Histograms for proper motions along right ascension and declination are also shown. The center of the circles is at the peak values of proper motions from the Gaussian distribution fits to the histograms. The inner and outer radius is of 2 and 4 mas per year, respectively. Filled circles denote kinematically selected members. Open triangles represent 3σ (∼2 mas per year) outliers from the mean of the Gaussian distribution fits to the histograms of the proper motions. Filled triangles display variables for which the proper motions are consistent with the mean value given their 3σ uncertainties. The bin size used in the histograms and the number of stars shown are indicated at the top.