Comparison of the [Fe/H] values from this work with those from C09 for the 45 clusters of our survey using values of Table A.3. Red triangles emphasize the 15 clusters used to compare with C09 in Sect. 4.1. Blue points are the six clusters not averaged by Carretta et al. (2009a) and analysed for the first time in a homogenous way in this work. A one-to-one line is plotted for reference. The residuals of the comparison are displayed in the bottom panel and have a standard deviation equal to 0.16 dex.
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