NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-07-20 T07:16:09 PDT
Help | Comment | NED Home

For refcode 2002MNRAS.329..221B:
Retrieve 55 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by Royal Astronomical Society. 2002MNRAS.329..221B High-redshift QSOs in the FIRST survey C.R. Benn, M. Vigotti, M. Pedani, J. Holt, K.-H. Mack, R. Curran and S.F. Sanchez ABSTRACT In a pilot search for high-redshift radio quasi-stellar objects (QSOs), we have obtained spectra of 55 FIRST sources (S_1.4 GHz_ > 1 mJy) with very red (O - E > 3) starlike optical identifications. 10 of the candidates are QSOs with redshifts 3.6 < z < 4.4 (four were previously known), six with z > 4. The remaining 45 candidates comprise: one z = 2.6 broad-absorption-line (BAL) QSO; three low-redshift galaxies with narrow emission lines; 18 probable radio galaxies; and 23 M stars (mainly misidentifications). The success rate (high-redshift QSOs / spectroscopically-observed candidates) for this search is 1/2 for S_1.4 GHz_ > 10 mJy, and 1/9 for S_1.4 GHz_ > 1 mJy. With an effective search area of 4030 deg^2^, the surface density of high-redshift (z > 4) QSOs discovered with this technique is 0.0015 deg^-2^. Keywords: quasars: emission lines - quasars: general - early Universe - radio continuum: galaxies.
Retrieve 55 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home