Upper panel. Optical and NIR (dereddened) CMDs for CenA-dE1, showing the stellar point sources cross-identified in both catalogs. Also shown are the boxes used to select luminous AGB candidate stars, and the resulting candidates are plotted as red circles. The objects marked with a black cross are cross-identified in the two datasets, but turn out to be probable background galaxies after visual inspection. Representative photometric errorbars are plotted along the CMDs. The blue solid lines in the NIR CMD indicate the 50% completeness limit. Lower panel. Combined CMDs in V0- and K0-bands for CenA-dE1. The stellar sources and the symbols are the same as above. We also plot (green lines) the isochrones with a fixed age of 10 Gyr spanning the metallicity range of the galaxy, with the same metallicity values as in Fig. 1. The blue lines have the same meaning as in the upper panel.
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