Gas near active galactic nuclei: A search for the 4.7 μm CO band D. Lutz, E. Sturm, R. Genzel, H. W. W. Spoon and G. J. Stacey A&A, 426 1 (2004) L5-L8 Published online: 05 October 2004 DOI: 10.1051/0004-6361:200400072