The Luminosity Function of high-redshift QSOs
Fontanot, Cristiani, Monaco, Nonino, Tozzi, Vanzella and the GOODS Team
We present our selection of QSO candidates in the GOODS fields based on optical color criteria and on the matching with X-ray catalogues, and the spectroscopic follow-up of resulting targets. Combining our sample with SDSS observations at brighter magnitudes we estimate the QSO-LF in the redshift interval 3.5