  The Transient Optical Sky Survey (TOSS) is an automated, ground-based
telescope system dedicated to searching for optical transient events. Small
telescope tubes are mounted on a tracking, semi-equatorial frame with a single
polar axis. Each fixed declination telescope records successive exposures which
overlap in right ascension. Nightly observations produce time-series images of
fixed fields within each declination band. We describe the TOSS data pipeline,
including automated routines used for image calibration, object detection and
identification, astrometry, and differential photometry. Time series of nightly
observations are accumulated in a database for each declination band. Despite
the modest cost of the mechanical system, results from the 2009-2010 observing
campaign confirm the system's capability for producing light curves of
satisfactory accuracy. Transients can be extracted from the individual
time-series by identifying deviations from baseline variability.
