N2H+ and N15NH+ toward the prestellar core 16293E in L1689N F. Daniel, A. Faure, L. Pagani, F. Lique, M. Gérin, D. Lis, P. Hily-Blant, A. Bacmann and E. Roueff A&A, 592 (2016) A45 Published online: 19 July 2016 DOI: 10.1051/0004-6361/201628192