| Since its entry into force on 26 July 1999, the AGN Agreement has been rectified and amended 5 times. |
| In summary, if the central AGN provides heating and contributes to the global quenching of the cluster cooling, it is also responsible for the production of cold gas in outlying regions. |
| The observations of MIDI show that the nature of the object is up to now in agreement with current AGN models. |
| Observations with high-resolution radio arrays show highly relativistic jets extending from an AGN to the radio lobes. |
| Indeed, in the current universe the remaining AGN population is made up predominantly of lower-luminosity Seyfert galaxies with relatively small supermassive black holes. |
| In addition, AGN typically shoot out enormous jets of high-speed gas. |
