GRB 091127: The cooling break race on magnetic fuel R. Filgas, J. Greiner, P. Schady, T. Krühler, A. C. Updike, S. Klose, M. Nardini, D. A. Kann, A. Rossi, V. Sudilovsky et al. (6 more) A&A, 535 (2011) A57 Published online: 04 November 2011 DOI: 10.1051/0004-6361/201117695