Odin observations of ammonia in the Sgr A +50 km s-1 cloud and circumnuclear diskAa. Sandqvist, Å. Hjalmarson, U. Frisk, S. Lundin, L. Nordh, M. Olberg and G. OlofssonA&A, 599 (2017) A135DOI: https://doi.org/10.1051/0004-6361/201629954