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We present the results of a search for potential transit signals in the firstthree quarters of photometry data acquired by the Kepler Mission. The targetsof the search include 151,722 stars which were observed over the full intervaland an additional 19,132 stars which were observed for only 1 or 2 quarters.From this set of targets we find a total of 5,392 detections which meet theKepler detection criteria: those criteria are periodicity of the signal, anacceptable signal-to-noise ratio, and a composition test which rejects spuriousdetections which contain non-physical combinations of events. The detectedsignals are dominated by events with relatively low signal-to-noise ratio andby events with relatively short periods. The distribution of estimated transitdepths appears to peak in the range between 40 and 100 parts per million, witha few detections down to fewer than 10 parts per million. The detected signalsare compared to a set of known transit events in the Kepler field of view whichwere derived by a different method using a longer data interval; the comparisonshows that the current search correctly identified 88.1% of the known events. Atabulation of the detected transit signals, examples which illustrate theanalysis and detection process, a discussion of future plans and open,potentially fruitful, areas of further research are included.

Detection of Potential Transit Signals in the First Three Quarters of Kepler Mission Data