Color–color (uiKs, left) and i-band concentration index (Δi6−12, right) diagrams for the full matched catalog (gray symbols) and the photometric GC candidates from the literature. Red diamonds, blue circles, and green squares indicate Liller & Alcaino (1983), Blecha (1986), and Beasley & Sharples (2000, Table 6) GC candidates, respectively.
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