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We present a candidate orbital period for the low mass X-ray binary XB1832-330 in the globular cluster NGC 6652 using a 6.5 hour Gemini Southobservation of the optical counterpart of the system. Light curves in g' and r'for two LMXBs in the cluster, sources A and B in previous literature, wereextracted and analyzed for periodicity using the ISIS image subtractionpackage. A clear sinusoidal modulation is evident in both of A's curves, ofamplitude ~0.11 magnitudes in g' and ~0.065 magnitudes in r', while B's curvesexhibit rapid flickering, of amplitude ~1 magnitude in g' and ~0.5 magnitudesin r'. A Lomb-Scargle test revealed a 2.15 hour periodic variation in themagnitude of A with a false alarm probability less than 10^-11, and nosignificant periodicity in the light curve for B. Though it is possiblesaturated stars in the vicinity of our sources partially contaminated oursignal, the identification of A's binary period is nonetheless robust.

A 2.15 Hour Orbital Period for the Low Mass X-Ray Binary XB 1832-330 in the Globular Cluster NGC 6652