Detection of OH+ and H2O+ towards Orion KL H. Gupta, P. Rimmer, J. C. Pearson, S. Yu, E. Herbst, N. Harada, E. A. Bergin, D. A. Neufeld, G. J. Melnick, R. Bachiller et al. (69 more) A&A, 521 (2010) L47 Published online: 01 October 2010 DOI: 10.1051/0004-6361/201015117