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Fig. 22.

image

[Fe/H] residuals averaged per GC versus mean temperature offset. The color coding resembles the cluster metallicity (see color bar on the right). Light colored error bars indicate the respective σ ΔT eff and σ [Fe/H] from Table 5. Red lines connect the same clusters corresponding to the same stars and spectra, but with stellar parameters either from C09, or GES DR3 (red circles).

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