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Published online by Cambridge University Press: 15 August 2009
We have started a survey of M 33 in order to find variable stars andCepheids in particular. We have obtained more than 30 epochs ofg'r'i' data with the CFHT and theone-square-degree camera MegaCam. We present first results from thissurvey, including the search for variable objects and a basiccharacterization of the various groups of variable stars.