Multiwavelength analysis of three supernovae associated with gamma-ray bursts observed by GROND

F. E. Olivares, J. Greiner, P. Schady, S. Klose, Thomas Christian Krühler, A. Rau, S. Savaglio, D. A. Kann, G. Pignata, J. Elliott, A. Rossi, M. Nardini, P. M. J. Afonso, R. Filgas, A. Nicuesa Guelbenzu, S. Schmidl, V. Sudilovsky