Ground-based photometry of space-based transit detections: photometric follow-up of the CoRoT mission - Deeg, H; Gillon, M; Shporer, A; Rouan, D; Stecklum, B; Aigrain, S; Alapini, A; Almenara, J; Alonso, R; Barbieri, M; Bouchy, F; Eisloeffel, J; et al. (2009)