Top panel: rest-frame velocity vs. projected clustercentric distance for the 110 member galaxies of the fiducial sample (Fig. 5). Crosses indicate galaxies formally rejected as interlopers by the “shifting gapper” procedure, but here considered in a more conservative view. The cluster center coincides with the position of the BCG. Red solid (dashed) curves enclose the region of allowed values for member galaxies according to the criterion of den Hartog & Katgert (1996) and using the upper (lower) limit of our mass estimate computed in the following (see Sect. 5.3). 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 0.25  Mpc(large blue 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 bottom 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).