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J/AJ/118/1435     VLA FIRST survey quasar radio emission     (Wadadekar+, 1999)

A study of quasar radio emission from the VLA FIRST survey Wadadekar Y., Kembhavi A. <Astron. J. 118, 1435 (1999)> =1999AJ....118.1435W
ADC_Keywords: QSOs ; Radio continuum ; Redshifts ; Surveys Keywords: catalogs - methods: statistical - quasars: general - surveys Abstract: Using the most recent (1998) version of the VLA FIRST survey radio catalog, we have searched for radio emission from 1704 quasars taken from the most recent (1993, Cat. VII/158) version of the Hewitt & Burbidge quasar catalog. These quasars lie in the roughly 5000 deg2 of sky already covered by the VLA FIRST survey. Our work has resulted in positive detection of radio emission from 389 quasars, of which 69 quasars have been detected for the first time at radio wavelengths. We find no evidence of a correlation between optical and radio luminosities for optically selected quasars. We find indications of a bimodal distribution of radio luminosity, even at a low flux limit of 1 mJy. We show that radio luminosity is a good discriminant between radio-loud and radio-quiet quasar populations, and that it may be inappropriate to make such a division on the basis of the radio-to-optical luminosity ratio. We discuss the dependence of the radio-loud fraction on optical luminosity and redshift. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 91 436 FIRST detections of quasars
See also: VIII/59 : the FIRST Survey, version 1999Jul (White+ 1999) : FIRST Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name *IAU designation 10- 12 A3 --- Sel *[ORCXU ] Selection technique 14- 18 F5.2 mag Pmag ? Photographic magnitude 20- 27 F8.2 mJy F1.4GHz 1.4GHz peak radio flux 29- 32 F4.2 --- z Redshift 34- 36 F3.1 arcsec Sep Separation with the FIRST source 38- 46 A9 --- Names Alternative designation 48- 91 A44 --- Radio Recent radio detection
Note on Name: The name is based on B1950 position, a 'B' should therefore be added in front of the name. Note on Sel: the following symbols are used: O: objective prism R: radio C: UV-excess X: X-ray U: selection technique not mentioned
History: From AJ electronic version * 14-Jan-2002: ReadMe corrected (IAU name based on B1950 position)
(End) James Marcout, Patricia Bauer [CDS] 30-Nov-1999
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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