Fontanot, Fabio, Cristiani, Stefano, Monaco, Pierluigi, Nonino, Mario, Vanzella, Eros, Brandt, W. Niel, ...
Aims: In this work the luminosity function of QSOs is measured in the redshift range 3.5
The luminosity function of high-redshift QSOs (2006)
Fontanot, Fabio, Cristiani, Stefano, Monaco, Pierluigi, Vanzella, Eros, Nonino, Mario, Brandt, W. Niel, ...
We measure the luminosity function of QSOs in the redshift range 3.5 < z < 5.2 for the absolute magnitude interval -21 < M_{145} < -28. Suitable criteria are defined to select faint QSOs in the GOODS...
Variability of the extreme z=4.72 blazar, GB 1428+4217 (1999)
Fabian, Andrew C., Celotti, Annalisa, Pooley, G., Iwasawa, K., Brandt, W. Niel
We report X-ray and radio variability of GB 1428+4217 which confirm its blazar nature. IR observations reveal a powerful optical-UV component, not obscured by dust, which is suggestive of the...