Left panel: CMD of the GES targets for Tr 20 with a distance from the centre d < 8′. Right panel: spatial distribution of the GES targets; the red dashed circles define the regions for d < 4′ and d < 8′ from the centre. In both panels, the orange triangles are GIRAFFE targets, while the blue filled circles are those of UVES; filled symbols are candidate members for RV (see Sect. 5). The stars in the photometric catalogue are plotted in grey.
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