Fig. 19.
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Error distribution of the metallicities derived for 133 557 DR3 RR Lyrae stars by the SOS pipeline. The mean and median metallicity errors are 0.46 dex (0.33 dex std) and 0.36 dex, respectively. We show only sources with σ[Fe/H] ≤ 2.0 dex (i.e. 99.6% of the sample). We also note that for 71% of the sources in the plot, σ[Fe/H] ≤ 0.5 dex.
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