Evidence for a proto-black hole and a double astrophysical component in GRB 101023A. V. Penacchioni, R. Ruffini, L. Izzo, M. Muccino, C. L. Bianco, L. Caito, B. Patricelli and L. AmatiA&A, 538 (2012) A58DOI: https://doi.org/10.1051/0004-6361/201118403