A search for distant radio-loud quasars in the CLASS survey: three new radio-selected quasars at z>4

Details A search for distant radio-loud quasars in the CLASS survey: three new radio-selected quasars at z>4 A search for distant radio-loud quasars in the CLASS survey: three new radio-selected quasars at z>4

2001-03-19

arxiv.org/abs/astro-ph/0103291v1

Mon.Not.Roy.Astron.Soc. 325 (2001) 1167

Astronomy and Astrophysics

Astrophysics

LaTeX, 7 pages, 5 Figs: to be published in MNRAS

Scientific paper

10.1046/j.1365-8711.2001.04528.x

We report on the search for distant radio-loud quasars in the Cosmic Lens All Sky Survey (CLASS) of flat spectrum radio sources with S_5GHz>30 mJy. Unresolved optical counterparts were selected from APM scans of POSS-I plates, with e<19.0 and red o-e>2.0 colours, in an effective area of ~6400 deg^2. Four sources were found to be quasars with z>4, of which one was previously known. This sample bridges the gap between the strong radio surveys with S_5GHz>200 mJy and the samples of radio-weak quasars that can be generated via radio observations of optically selected quasars. In addition, 4 new quasars at z>3 have been found. The selection criteria result in a success-rate of ~1:7 for radio-loud quasars at z>4, which is a significant improvement over previous studies. This search yields a surface density of 1 per 1600 deg^2, which is about a factor of ~15 lower than that found in a similar search for radio-quiet quasars at z>4. The study presented here is strongly biased against quasars beyond z>4.5, since the e-passband of the POSS-I only samples the spectra shortward of 1200 Angstrom at these redshifts.

Affiliated with

Also associated with

No associations

Rating

A search for distant radio-loud quasars in the CLASS survey: three new radio-selected quasars at z>4 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A search for distant radio-loud quasars in the CLASS survey: three new radio-selected quasars at z>4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A search for distant radio-loud quasars in the CLASS survey: three new radio-selected quasars at z>4 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-189167