Narrow-line Region of Type I QSOs

We investigate various physical parameters of the narrow-line region (NLR) of two type I QSOs, PG1012+008 and PG1307+085. Using the spectra obtained with the FORS1 at the VLT with an excellent seeing condition (<0.7"), we can extract spectra with varying distances from the center out to the galactic scales. From these spectra we derive physical quantities such as reddening, temperature, electron density, and ionization parameter as a function of distance from the center. We also explore the possibility of defining the size of the NLR with line ratio diagnostics regardless of starbursts, shock-ionized gas, or tidal tails.