The search for magnetic fields in mercury-manganese stars V. Makaganiuk, O. Kochukhov, N. Piskunov, S. V. Jeffers, C. M. Johns-Krull, C. U. Keller, M. Rodenhuis, F. Snik, H. C. Stempels and J. A. Valenti A&A, 525 (2011) A97 Published online: 03 December 2010 DOI: 10.1051/0004-6361/201015666