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Published online by Cambridge University Press: 13 November 2008
Many problems in time domain astronomy are bestapproached with continuous,high frequency (<1 minute) observations over a large area of the sky, because event rates are generally less than 0.01 detections per sq. degree in a year. For GRBs and theearliest stages of SNe, follow-up spectroscopy, multiband photometry andpolarization measurements need to be triggered in seconds or minutes.Plateau sites in Antarctica are optimal for a new survey, Xian(eXtreme Imaging Antarctic Network), for which the scientific motivation is presented.