Excitation conditions and energetics of the dense gas in M17 SW J.P. Pérez-Beaupuits, R. Güsten, M. Spaans, V. Ossenkopf, K.M. Menten, M.A. Requena-Torres, J. Stutzki, H. Wiesemeyer and C. Guevara EAS Publications Series, 75-76 (2015) 205-206 Published online: 20 May 2016 DOI: 10.1051/eas/1575040