Publications of the Astronomical Society of the Pacific 109: 883-906, 1997 August Galactic Globular Cluster Metallicity Scale from the Ca II Triplet I. Catalog GLEN A. RUTLEDGE, JAMES E. HESSER, AND PETER B. STETSON National Research Council of Canada, Herzberg Institute of Astrophysics, Dominion Astrophysical Observatory, 5071 West Saanich Road, RR5, Victoria BC V8X 4M6, Canada Electronic mail: firstname.lastname@hia.nrc.ca MARIO MATEO Department of Astronomy, University of Michigan, 821 Dennison Building, Ann Arbor, Michigan 48109-1090 Electronic mail: mateo@astro.lsa.umich.edu LUC SIMARD Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Victoria, British Columbia V8W 3P6, Canada Electronic mail: simard@beluga.phys.uvic.ca MICHAEL BOLTE UCO/Lick Observatory, University of California, Santa Cruz, California 95064 Electronic mail: bolte@lick.ucsc.edu EILEEN D. FRIEL Maria Mitchell Observatory, 3 Vestal Street, Nantucket, Massachusetts 02554 Electronic mail: efriel@mmo.org YANNICK COPIN Ecole Normale Superieure de Lyon, 46, allee d'Italie, 69364 Lyon cedex 07, France Electronic mail: yannick.copin@ens.ens-lyon.fr Abstract: We have obtained 2640 CCD spectra with resolution ~ 4 A in the region 7250-9000 A for 976 stars lying near the red giant branches in color-magnitude diagrams of 52 Galactic globular clusters. Radial velocities of ~16 km/s accuracy per star determined from the spectra are combined with other criteria to assess quantitative membership probabilities. Measurements of the equivalent widths of the infrared calcium triplet lines yield a relative metal-abundance ranking with a precision that compares favorably to other techniques. Regressions between our system and those of others are derived. Our reduction procedures are discussed in detail, and the resultant catalog of derived velocities and equivalent widths is presented. The metal abundances derived from these data will be the subject of a future paper. (c)Astronomical Society of the Pacific