Collaborators: Roberto Gilli, Francesco Calura, Eros Vanzella, Micol Bolzonella, Andrea Comastri (INAF-OABO) − Cristian Vignali, Marcella Brusa (DIFA-UniBO) − A. Bongiorno (INAF-OARoma) − Anna Feltre (IAP-France) − N.Cappelluti (Yale-USA)

AccordingtotheUnifiedModel,AGNcanbeclassifiedintotwoclassesdependingonwhetherthecentral Black Hole, its associated non-thermal continuum, and broad emission line region arevieweddirectly(type-1)orareobscuredbyadustycircumnuclearmedium(type-2)

AccordingtotheUnifiedModel,AGNcanbeclassifiedintotwocategoriesdependingonwhetherthecentralBlackHole,itsassociatednon-thermalcontinuum,andbroademissionlineregionarevieweddirectly(type-1)orareobscuredbyadustycircumnuclearmedium(type-2)

OPEN QUESTIONS •  How does the photoionization code Cloudy fit with UV NL fluxes in AGN? •  NLR-gas conditions? Do low-metallicity AGN exist at high redshift? •  The long-standing Nitrogen problem. High abundance or gas conditions? •  NLR gas metallicity vs. host galaxy stellar mass. Looking for a mass-

metallicity (mirrored in the ~kpc scale NLR gas) at redshifts > 2.

SPIN-OFF PROJECTS •  Clustering properties of CIV-selected AGN (type1 vs. type2) [ ] •  X-ray properties of CIV-selected AGN sample [ ]

FUTURE •  Vandels (Deeper but high S/N spectra) − J-PAS (huge sample)