Top: SMC-L62 cluster and surrounding field stars region. The adopted radius is indicated with a red circle. The CI value in the top right box is the contamination index; see Sect. 3.2. Middle: CMD of the cluster region for SMC-L62 (left), where nmemb is the approximate number of cluster stars. The CMD of 10 combined surrounding field regions, each with an area equal to that of the cluster, is also shown (right). In both panels Naccpt is the number of stars that were not rejected owing to their large photometric errors. Rejected stars with large errors are shown as pale green crosses. Bottom: cluster region after applying the DA (left); MPs vary according to the color bar at the top right. Dotted horizontal and vertical lines show the binning used to reject low MP stars cell by cell, as obtained via the Bayesian blocks method. Open circles (drawn semi-transparent) represent rejected stars. Nfit is the number of stars kept unsubtracted by the cell-by-cell rejection. The best-fitted isochrone is overplotted with a green line. The respective generated synthetic CMD is shown in the right panel. Nsynth is the number of stars in the synthetic cluster CMD, and the dotted lines represent the binning obtained using Knuth’s rule, applied in the synthetic cluster match process. The limiting magnitude of the synthetic CMD is taken from the limiting magnitude of the observed cluster (roughly T1 ≈ 22 mag, in this case).
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