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Using the Green Bank Telescope, we conducted a ``snapshot'' survey for watermaser emission toward the nuclei of 611 galaxies and detected eight newsources. The sample consisted of nearby (v < 5000 km/s) and luminous (M_B <-19.5) galaxies, some with known nuclear activity but most not previously knownto host AGNs. Our detections include both megamasers associated with AGNs andrelatively low luminosity masers probably associated with star formation. Thedetection in UGC 3789 is particularly intriguing because the spectrum showsboth systemic and high-velocity lines indicative of emission from an AGNaccretion disk seen edge-on. Based on six months of monitoring, we detectedaccelerations among the systemic features ranging from 2 to 8 km/s/yr, thelarger values belonging to the most redshifted systemic components.High-velocity maser lines in UGC 3789 show no detectable drift over the sameperiod. Although UGC 3789 was not known to be an AGN prior to this survey, thepresence of a disk maser is strong evidence for nuclear activity, and anoptical spectrum obtained later has confirmed it. With follow up observations,it may be possible to measure a geometric distance to UGC 3789.

The Discovery of Water Maser Emission from Eight Nearby Galaxies