The XXL Survey - III. Luminosity-temperature relation of the bright cluster sample P. A. Giles, B. J. Maughan, F. Pacaud, M. Lieu, N. Clerc, M. Pierre, C. Adami, L. Chiappetti, J. Démoclés, S. Ettori et al. (6 more) A&A, 592 (2016) A3 Published online: 15 June 2016 DOI: 10.1051/0004-6361/201526886