An X-ray review of MS 1054–0321: Hot or not? I. M. Gioia, V. Braito, M. Branchesi, R. Della Ceca, T. Maccacaro and K.-V. Tran A&A, 419 2 (2004) 517-525 Published online: 03 May 2004 DOI: 10.1051/0004-6361:20034477