Ks × (J − Ks) colour–magnitude diagram for the VVV bulge area, as shown in Fig. 2. In the left-hand panel is the CMD for all point sources found in the matched catalogues, in a total of 173,150,467 sources. The right-hand panel shows only point sources flagged as “stellar” in the three J, H, and Ks catalogues, according with the CASU photometry. The total number of stellar sources is 84 095 284. Contour lines mark density levels in steps of 5% from the maximum density. The reddening vector associated with an extinction of E(B − V) = 2, based on the relative extinctions of the VISTA filters, and assuming the Cardelli et al. (1989) extinction law, is also shown in both panels.
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