Fig. 5.
Abundances of the α-elements for Pal 15 (red star) and the reference outer halo GCs. Here, red open circles show GCs with mean abundances derived from co-added spectra. The blue boxplots refer to the observed 1σ spread in a given GC (extent of the boxes in either dimension), while the inlaid error bars depict the mean abundance error on the respective measurements.
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