High-resolution absorption spectroscopy of the OH 2Π3/2 ground state line H. Wiesemeyer, R. Güsten, S. Heyminck, K. Jacobs, K. M. Menten, D. A. Neufeld, M. A. Requena-Torres and J. Stutzki A&A, 542 (2012) L7 Published online: 10 May 2012 DOI: 10.1051/0004-6361/201218915