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Fig. 3

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Discovery near-infrared colour − magnitude diagram of VVV CL001 for a 15 arcsec radius area centered on the cluster (left) compared with a field of the same area located east (middle), and a field of UKS 1 of the same size that is offset from the cluster centre by () (right). The small offset for UKS 1 was applied, since the centre of this cluster is barely resolved. The horizontal line at Ks = 14.3 shows the limit of 2MASS photometry. Comparing UKS 1 and VVV CL001, we find that the RGB of UKS 1 is much more populated, hence VVV CL001 is far less massive then UKS 1.

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