tokens: The authors thank F. Israel for comments on the manuscript. The authors are indebted to F. Müller-Sánchez for providing the SINFONI H 2 gas emission map of NGC 1068, O. González-Martín for the Chandra data, J. Wang for the Chandra image of NGC 1068, L. Burtscher for the SINFONI data cubes, F. Combes for the ALMA image of NGC 1566, D. Espada for the ALMA image of CenA, and S. García Burillo for the ALMA image of NGC 1068. MM acknowledges financial support from AYA2011-25527 and NASA Chandra grant G05-16099X. The research leading to the results has received funding from the European Community's Seventh Framework Programme under grant agreement 312430. Research by JAFO was supported by Canary Islands CIE: Tricontinental Atlantic Campus. This research is based on ESO VLT programmes P71.B-0632A, 74.B-0722B and 86.B-0484. The research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
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