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Kim, Hak-Sub,Cho, Jaeil,Sharples, Ray M.,Vazdekis, Alexandre,Beasley, Michael A.,Yoon, Suk-Jin American Astronomical Society 2016 The Astrophysical journal Supplement series Vol.227 No.2
<P>We perform integrated spectroscopy of 24 Galactic globular clusters (GGCs). Spectra are observed from one core radius for each cluster with a high wavelength resolution of similar to 2.0 angstrom. FWHM. In combination with two existing data sets from Puzia et al. and Schiavon et al., we construct a large database of Lick spectral indices for a total of 53 GGCs with a wide range of metallicities, -2.4 less than or similar to [Fe/H] less than or similar to 0.1, and various horizontal-branch morphologies. The empirical index-to-metallicity conversion relationships are provided for the 20 Lick indices for the use of deriving metallicities for remote, unresolved stellar systems.</P>