A highly sensitive search for magnetic fields in B, A and F stars S. L. S. Shorlin, G. A. Wade, J.-F. Donati, J. D. Landstreet, P. Petit, T. A. A. Sigut and S. Strasser A&A, 392 2 (2002) 637-652 Published online: 30 August 2002 DOI: 10.1051/0004-6361:20021192