Detection of 183 GHz H2O megamaser emission towards NGC 4945 E. M. L. Humphreys, W. H. T. Vlemmings, C. M. V. Impellizzeri, M. Galametz, M. Olberg, J. E. Conway, V. Belitsky and C. De Breuck A&A, 592 (2016) L13 Published online: 12 August 2016 DOI: 10.1051/0004-6361/201629168