All Tables

Table 1: Main parameters for the cluster sample. The cluster denominations come from Vikhlinin et al. (1998, VMF) and Gilbank et al. (2004, XDCS). Coordinates are given with respect to the X-ray centroid. X-ray fluxes are taken from Mullis et al. (2003). $\ensuremath {R_{\rm virial}}$ is the virial radius and $\sigma$ the velocity dispersion. N is the number of members identified in each cluster.
Table 2: Main parameters for the groups candidates for our fields. Their identification codes show the average positions of the members. Mean redshifts (z) and average deviations are shown as velocities ( $\sigma$ ). The biweight estimators were used only in groups with at least 8 members. The group number identify member galaxies in the online table.