Submillimeter absorption from SH+, a new widespread interstellar radical, 13CH+ and HCl K. M. Menten, F. Wyrowski, A. Belloche, R. Güsten, L. Dedes and H. S. P. Müller A&A, 525 (2011) A77 Published online: 02 December 2010 DOI: 10.1051/0004-6361/201014363