Color–color (upper left and lower panels) and color–magnitude (upper right) diagrams of the ∼ 350 selected GC candidates (blue circles) and the spectroscopically confirmed GCs. Yellow squares and green diamonds indicate the Beasley & Sharples (2000) and Olsen et al. (2004) samples, respectively. For the color–magnitude diagram, the full sample of matched sources (gray dots) and the position of the turnover magnitude (long-dashed horizontal black line) are also shown.
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