Left panel: RV distribution of all the GES targets for different distances from the cluster centre. The vertical line is the average RV of stars in the shaded histogram, obtained after an iterative two-sigma-clipping on the median. Right panel: distance from the cluster centre versus RV of the targets. The black dots are the stars selected as candidate members using the average RV (red line) and σ obtained from the whole group of targets (bottom histogram, left panel).
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