The intracluster magnetic field power spectrum in Abell 2255 F. Govoni, M. Murgia, L. Feretti, G. Giovannini, K. Dolag and G. B. Taylor A&A, 460 2 (2006) 425-438 Published online: 12 September 2006 DOI: 10.1051/0004-6361:20065964