Fig. 11.
Metallicity estimates for 13 stars in the M15 cluster with both SEGUE-1 spectra and J-PLUS photometry. Estimates are shown above the 1σ and 2σ regions corresponding to the standard deviation of SPHINX estimates for the entire cluster, and the median error estimate from the SSPP. The small red ellipse in the center represents the intrinsic scatter of the M15 cluster, [Fe/H] = − 2.33 ± 0.02 (Carretta et al. 2009).
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