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The Chinese Small Telescope ARray (CSTAR) carried out high-cadencetime-series observations of 20.1 square degrees centered on the South CelestialPole during the 2008, 2009 & 2010 winter seasons from Dome A in Antarctica. Thenearly-continuous 6 months of dark conditions during each observing seasonallowed for >10^6 images to be collected through gri and clear filters,resulting in the detection of >10^4 sources over the course of 3 years ofoperation. The nearly space-like conditions in the Antarctic plateau are anideal testbed for the suitability of very small-aperture (<20 cm) telescopes todetect transient events, variable stars and stellar flares. We present theresults of a robust search for such objects using difference image analysis ofthe data obtained during the 2009 & 2010 winter seasons. While no transientswere found, we detected 29 flaring events and find a normalized flaring rate of5+\-4x10^-7 flare/hour for late-K dwarfs, 1+\-1x10^-6 flare/hour for M dwarfsand 7+\-1x10^-7 flare/hour for all other stars in our sample. We suggest futuresmall-aperture telescopes planned for deployment at Dome A would benefit from atracking mechanism, to help alleviate effects from ghosting, and a finer pixelscale, to increase the telescope's sensitivity to faint objects. We find thatthe light curves of non-transient sources have excellent photometric qualitiesonce corrected for systematics, and are limited only by photon noise andatmospheric scintillation.

Stellar Variability and Flare Rates from Dome A, Antarctica using 2009 and 2010 CSTAR Observations