J/ApJS/135/227 The FIRST bright quasar survey. III. (Becker+, 2001)
The FIRST bright quasar survey. III. The South Galactic Cap. Becker R.H., White R.L., Gregg M.D., Laurent-Muehleisen S.A., Brotherton M.S., Impey C.D., Chaffee F.H., Richards G.T., Helfand D.J., Lacy M., Courbin F., Proctor D.D. <Astrophys. J. Suppl. Ser. 135, 227 (2001)> =2001ApJS..135..227B
ADC_Keywords: Radio sources ; QSOs ; BL Lac objects ; Galaxies, radio ; H II regions ; Magnitudes Keywords: BL Lacertae objects: general - galaxies: active - galaxies: starburst - quasars: general - radio continuum: galaxies - surveys Abstract: We present the results of an extension of the FIRST Bright Quasar Survey (FBQS) to the South Galactic cap, and to a fainter optical magnitude limit. Radio source counterparts with SERC R magnitudes brighter than 18.9 which meet the other FBQS criteria are included. We supplement this list with a modest number of additional objects to test our completeness for quasars with extended radio morphologies. The survey covers 589deg2 in two equatorial strips in the southern cap. We have obtained spectra for 86% of the 522 candidates and find 321 radio-selected quasars of which 264 are reported here for the first time. A comparison of this fainter sample with the FBQS sample shows the two to be generally similar. Fourteen new broad absorption line (BAL) quasars are included in this sample. When combined with the previously identified BAL quasars in our earlier papers, we can discern a break in the frequency of BAL quasars with radio loudness, namely that the relative number of high-ionization BAL quasars drops by a factor of 4 for quasars with a radio-loudness parameter R*>100. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 113 321 *FIRST Bright Quasar Catalog table2.dat 113 31 Narrow-line AGN in FBQS candidate list table3.dat 113 23 BL Lacertae objects in FBQS candidate list table4.dat 113 23 H II region galaxies in FBQS candidate list table5.dat 113 17 Passive galaxies in FBQS candidate list table6.dat 113 32 Stars in FBQS candidate list table7.dat 114 75 Objects without spectra in FBQS candidate list table8.dat 62 14 Broad Absorption-Line quasars
Note on table1.dat: All objects are defined as <FBQS JHHMM+DDMM> in Simbad.
See also: VIII/59 : The FIRST Survey, version 1999Jul (White+ 1999) J/AJ/112/407 : The FIRST bright QSO survey. I. (Gregg+, 1996) J/ApJS/126/133 : The FIRST bright quasar survey. II. (White+, 2000) J/AJ/121/1872 : The FIRST radio-selected QSOs (Helfand+, 2001) Byte-by-byte Description of file: table[1-7].dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Right Ascension (J2000) 4- 5 I2 min RAm Right Ascension (J2000) 7- 12 F6.3 s RAs Right Ascension (J2000) 14 A1 --- DE- Sign of the Declination (J2000) 15- 16 I2 deg DEd Declination (J2000) 18- 19 I2 arcmin DEm Declination (J2000) 21- 25 F5.2 arcsec DEs Declination (J2000) 27- 28 A2 --- s/g Optical morphology in the APM catalog (1) 30- 34 F5.2 mag Rmag The APM R plate magnitude (2) 36- 40 F5.2 mag Bmag The APM B plate magnitude (2) 42- 46 F5.2 mag B-R Extinction-corrected APM (B-R) color (2) 48- 51 F4.2 mag AR The APM R band extinction correction (3) 53- 57 F5.2 arcsec Sep Separation between radio and optical positions 59- 65 F7.2 mJy Speak FIRST 20cm peak flux density 67- 73 F7.2 mJy Sint FIRST 20cm integrated flux density 75- 79 F5.1 mag BMAG ? The absolute B magnitude 81- 84 F4.1 [mW/m2/Hz] logLR ? Log of radio luminosity at a rest-frame frequency of 5GHz in units of ergs/cm2/s/Hz (4) 86- 90 F5.2 --- logR* ? K-corrected 5 GHz radio to 2500Å optical luminosity ratio (5) 92- 96 F5.3 --- z ? Redshift 98-108 A11 --- Notes Individual object notes (6) 110-113 F4.2 --- ProbQ ? Probability that candidate is a quasar (7)
Note (1): Optical morphology: * = stellar on both plates; gR = nonstellar on R plate; gB = nonstellar on B plate. Note (2): Magnitudes are extinction corrected. Note that magnitudes are unreliable for objects brighter than ∼15th magnitude (Paper II). Note (3): Computed as 2.7E(B-V) using the extinction maps of Schlegel et al. (1998ApJ...500..525S). The correction for B is 4.3E(B-V)=1.59AR. Note (4): Assuming spectral index α=-0.5(Fν ∝ να) Note (5): Using the definition of Stocke et al. (1992ApJ...396..487S). Note (6): the symbols have the following meaning: o = Previously known QSO (table1.dat) or AGN (table2.dat) or BL Lac object (table3.dat) or galaxy (table5.dat) from NASA Extragalactic Database (NED) or from Veron-Cetty & Veron (1998, Cat. VII/215) catalog. new z = Newly determined redshift for previously known object. No spec = A previously known quasar for which no spectrum appears in Fig. 9 DBL = Object included in sample as central-component of core-less double CJ = Object included in sample as match to core-jet source. X = X-ray source in ROSAT BSC (Voges et al., 1996, Cat. IX/10). I = Infrared source in IRAS FSC (Moshir et al., 1992, Cat. II/156) HiBAL = Object shows broad absorption lines from high-ionization elements dmpLα = Object shows damped Lyα absorption ? = Quasar classification is considered uncertain (table3.dat) In table1.dat, Notes followed by ``?'' are objects that fail the `balnicity'' test (Weymann et al., 1991ApJ...373...23W) but may nonetheless be a BAL. Note (7): For table7.dat only. Computed as described in Paper II. All source parameters including color were used.
Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Right ascension (J2000) 4- 5 I2 min RAm Right ascension (J2000) 7- 12 F6.3 s RAs Right ascension (J2000) 14 A1 --- DE- Declination sign (J2000) 15- 16 I2 deg DEd Declination (J2000) 18- 19 I2 arcmin DEm Declination (J2000) 21- 25 F5.2 arcsec DEs Declination (J2000) 27- 31 F5.1 mag BMAG Absolute B magnitude 33- 36 F4.1 [mW/m2/Hz] logLR Log of radio luminosity at a rest-frame frequency of 5 GHz 38- 41 F4.2 --- logR* K-corrected 5 GHz radio to 2500Å optical luminosity ratio 43- 47 F5.3 --- z Redshift 49- 52 I4 --- BAL BALnicity index (1) 53 A1 --- n_BAL [b] BAL computed from MgII lines (2) 55- 62 A8 --- Note Notes
Note (1): BALnicity index, (Weymann et al., 1991ApJ...373...23W), which if nonzero indicates high confidence that the absorption is a true broad-absorption line rather than associated absorption. Note (2): b: BALnicity was computed from Mg II, which generally is narrower than the high-ionization lines.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 10-Sep-2001
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