Detection of a weak surface magnetic field on Sirius A: are all tepid stars magnetic? P. Petit, F. Lignières, M. Aurière, G. A. Wade, D. Alina, J. Ballot, T. Böhm, L. Jouve, A. Oza, F. Paletou and S. Théado A&A, 532 (2011) L13 Published online: 08 August 2011 DOI: 10.1051/0004-6361/201117573