Direct evidence of a sub-stellar companion around CT Chamaeleontis T. O. B. Schmidt, R. Neuhäuser, A. Seifahrt, N. Vogt, A. Bedalov, Ch. Helling, S. Witte and P. H. Hauschildt A&A, 491 1 (2008) 311-320 Published online: 17 September 2008 DOI: 10.1051/0004-6361:20078840