Fig. 11.
Colour–magnitude diagram of EXT8 overlaid with the HB of M 5 and an [Fe/H] = −2.9 BaSTI isochrone with an age of 13 Gyr (in both cases shifted vertically to match up with EXT8). The boxes show the selection regions for BHB and RHB stars, and the slanted lines show the IS boundaries. The two RR Lyrae candidates are marked with larger red circles.
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