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19 April 2024 |
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The FIRST Bright Quasar Survey. II. 60 Nights and 1200 Spectra Later | | R. L. White
; R. H. Becker
; M. D. Gregg
; S. A. Laurent-Muehleisen
; M. S. Brotherton
; C. D. Impey
; C. E. Petry
; C. B. Foltz
; F. H. Chaffee
; G. T. Richards
; W. R. Oegerle
; D. J. Helfand
; R. G. McMahon
; J. E. Cabanela
; | | Date: |
10 Dec 1999 | | Subject: | astro-ph | | Abstract: | We have used the VLA FIRST survey and the APM catalog of the POSS-I plates as the basis for constructing a new radio-selected sample of optically bright quasars. This is the first radio-selected sample that is competitive in size with current optically selected quasar surveys. Using only two basic criteria, radio-optical positional coincidence and optical morphology, quasars and BL Lacs can be identified with 60% selection efficiency; the efficiency increases to 70% for objects fainter than magnitude 17. We show that a more sophisticated selection scheme can predict with better than 85% reliability which candidates will turn out to be quasars. This paper presents the second installment of the FIRST Bright Quasar Survey with a catalog of 636 quasars distributed over 2682 square degrees. The quasar sample is characterized and all spectra are displayed. The FBQS detects both radio-loud and radio-quiet quasars out to a redshift z>3. We find a large population of objects of intermediate radio-loudness; there is no evidence in our sample for a bimodal distribution of radio characteristics. The sample includes ~29 broad absorption line quasars, both high and low ionization, and a number of new objects with remarkable optical spectra. | | Source: | arXiv, astro-ph/9912215 | | Services: | Forum | Review | PDF | Favorites | |
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