Top panel: rest-frame velocity vs. projected distance from the cluster center of cluster members (circles). The red cross indicates the galaxy rejected by the “shifting gapper” selection procedure. Middle and bottom panels: differential (big circles) and integral (small points) profiles of mean velocity and LOS velocity dispersion, respectively. For the differential profiles, we plot the values for four annuli from the center of the cluster, each of 0.2  Mpc(large green symbols). For the integral profiles, the mean and dispersion at a given (projected) radius from the cluster-center is estimated by considering all galaxies within that radius – the first value computed on the five galaxies closest to the center. The error bands at the 68% c.l. are also shown. In the lower panel, the horizontal line represents the X-ray temperature with the respective errors transformed in σ_V assuming the density-energy equipartition between ICM and galaxies, i.e. β_spec = 1 (see Sect. 5).