Fig. 5.

Median difference ([Fe/H]W12 − [Fe/H]S05) between the spectroscopic and photometric metallicities, as function of photometric metallicity, when the latter are anchored to the Jurcsik (1995, upper panel) or the Carretta et al. (2009, lower panel) metallicity scales. The red dashed line marks zero. The shaded grey region marks metallicities outside the photometric metallicity calibration interval.
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