The optical SN 2012bz associated with the long GRB 120422A A. Melandri, E. Pian, P. Ferrero, V. D’Elia, E. S. Walker, G. Ghirlanda, S. Covino, L. Amati, P. D’Avanzo, P. A. Mazzali et al. (27 more) A&A, 547 (2012) A82 Published online: 31 October 2012 DOI: 10.1051/0004-6361/201219879