Fig. 20
Comparison of [Fe/H] from this work (Table 5) with those from literature, as revised in Table 2. The error bars are the weighted average of the [Fe/H] of member stars in each cluster, as presented in Table 6. For NGC 6553 and NGC 6558 the error bars are not visible because they are too small (see Table 5). In the lower panel we show the residuals.
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