HD 161701, a chemically peculiar binary with a HgMn primary and an Ap secondary J. F. González, C. Saffe, F. Castelli, S. Hubrig, I. Ilyin, M. Schöller, T. A. Carroll, F. Leone and M. Giarrusso A&A, 561 (2014) A63 Published online: 23 December 2013 DOI: 10.1051/0004-6361/201322327