Abstract
Sulentic et al. (2007) defined the 4DE1, which is a four dimensions parameter space that uses optical, UV and X-ray measures to discriminate between different classes of AGN. Using new X-ray data from the satellite XMM-Newton, we present a way to visualize all the parameters in one 3D graph made by the open source software TOP CAT. The different correlations have been framed in the context of an evolutionary scheme and we make an interpretation of the underlying physics.
