Normalized heliocentric radial velocity distribution function for all sampled stars observed in the p0m2 (top panel), m1p2 (middle panel), and p0p2 (bottom panel) fields. The best fit to the velocity distribution (solid black line) is obtained by using a combination of two Gaussian (red and blue solid lines) functions whose sigma are also reported in each panel. The residuals of the best fit are shown for each field in the insets.