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Alicia M. Soderberg (NOAO and Bates College), Caty A. Pilachowski (NOAO)
We report radial velocities for 303 giant stars in the globular clusters M3, M13, M15, and M92. Spectra were obtained using the 4-m Mayall and 3.5-m WIYN telescopes and the Hydra fiber positioner between 1993 and 1997; most spectra were provided by the NOAO WIYN Queue Program. Typical visual magnitude values were 12 < V < 15.5. For some clusters, observations spanned times from a week to six months. The uncertainties in the velocity measurements are typically 1~km~s-1. Several stars show velocity variations which may result from binary companions or atmospheric motions. Mean cluster velocities were measured to be -107, -120, -146, and -246 for M15, M92, M3, and M13 respectively. We anticipate the collection of follow-up observations of these candidates to further examine the probability of close companions.