Discovery of interstellar mercapto radicals (SH) with the GREAT instrument on SOFIA D. A. Neufeld, E. Falgarone, M. Gerin, B. Godard, E. Herbst, G. Pineau des Forêts, A. I. Vasyunin, R. Güsten, H. Wiesemeyer and O. Ricken A&A, 542 (2012) L6 Published online: 10 May 2012 DOI: 10.1051/0004-6361/201218870