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Fig. 3.
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mF322W2 vs. mF606W − mF322W2 CMD of Boötes I (left panel) and mF322W2 vs. ΔF606W, F322W2 verticalized diagram of the lower MS (right panel). We superimpose on the CMD nine isochrones with varying [Fe/H] and [α/Fe], as indicated in the inset. The isochrones used to verticalize the diagram are shown with continuous lines.
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