Neural-network selection of high-redshift radio quasars, and the luminosity function at z~4

D. Tuccillo, J. I. Gonzalez-Serrano, C. R. Benn

We obtain a sample of 87 radio-loud QSOs in the redshift range 3.6<z<4.4 by cross-correlating sources in the FIRST radio survey S{1.4GHz} > 1 mJy with star-like objects having r <2…