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J/ApJS/126/133 The FIRST bright quasar survey. II. (White+, 2000)
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The FIRST bright quasar survey. II. 60 nights and 1200 spectra later
White R.L., Becker R.H., Gregg M.D., Laurent-Muehleisen S.A.,
Brotherton M.S., Impey C.D., Petry C.E., Foltz C.B., Chaffee F.H.,
Richards G.T., Oegerle W.R., Helfand D.J., McMahon R.G., Cabanela J.E.
<Astrophys. J. Suppl. Ser. 126, 133 (2000)>
=2000ApJS..126..133W
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ADC_Keywords: BL Lac objects ; Galaxies, radio ; QSOs ; Radio sources
Keywords: BL Lacertae objects: general - galaxies: active - galaxies:
starburst - quasars: general - radio continuum: galaxies
Abstract:
We have used the Very Large Array (VLA) FIRST survey and the Automated
Plate Measuring Facility (APM) catalog of the Palomar Observatory Sky
Survey I (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 Lac objects can be identified with 60% selection efficiency;
the efficiency increases to 70% for objects fainter than 17 mag. 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 (FBQS), with a catalog of 636 quasars distributed
over 2682 deg^2^. The quasar sample is characterized and all spectra
are displayed.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 122 636 FIRST bright quasar catalog
table3.dat 111 96 Narrow-line AGNs in FBQS candidate list
table4.dat 128 68 BL Lac objects in FBQS candidate list
table5.dat 116 190 HII regions galaxies in FBQS candidate list
table6.dat 111 52 Passive galaxies in FBQS candidate list
table7.dat 89 88 Stars in FBQS candidate list
table8.dat 93 108 Objects without spectra in FBQS candidate list
ref.dat 136 25 Code references for data in table*.dat
fitfiles.dat 49 617 Index of files in fits subdirectory
fits/* . 617 FITS spectra for 617 FBQS candidates
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See also:
VIII/59 : the FIRST Survey, version 1999Jul (White+ 1999)
J/AJ/118/1435 : VLA FIRST survey quasar radio emission (Wadadekar+, 1999)
J/AJ/112/407 : The FIRST bright QSO survey (Gregg+, 1996)
Byte-by-byte Description of file: table2.dat table3.dat table4.dat
Byte-by-byte Description of file: table5.dat table6.dat
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Bytes Format Units Label Explanations
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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)
13 A1 --- DE- Declination sign
14- 15 I2 deg DEd Declination (J2000)
17- 18 I2 arcmin DEm Declination (J2000)
20- 24 F5.2 arcsec DEs Declination (J2000)
26- 27 A2 --- Class Optical morphology in the APM catalog (1)
29- 33 F5.2 mag Emag APM E plate magnitude
35- 39 F5.2 mag Omag APM O plate magnitude
41- 45 F5.2 mag (O-E) The O-E color
47- 50 F4.2 mag ExtE Extinction correction applied to E
52- 55 F4.2 arcsec Sep Separation between radio and optical
57- 64 F8.2 mJy 20cm The 20 cm peak flux density from FIRST
66- 73 F8.2 mJy RFlux Integrated flux density from FIRST
75- 79 F5.1 mag BMag ? B band absolute magnitude
81- 84 F4.1 [mW/m2/Hz] LogL ? Log radio luminosity in
ergs/cm^2^/s/Hz (2)
86- 90 F5.2 [-] LumRat ? K-corrected 5 GHz to 2500{AA} optical
luminosity ratio (3)
92- 96 F5.3 --- z ? Redshift
100-129 A30 --- Notes Notes on the object (see ref.dat file)
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Note (1):
gE = morphology is notstellar on the E plate
gO = morphology is notstellar on the O plate
* = object is stellar on both plates
Note (2): Rest-frame frequency of 5 GHz assuming
F_{nu}_ proportional to {nu}^-0.5^
Note (3): Using the definition of Stocke et al. (1992ApJ...396..487S)
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Byte-by-byte Description of file: table7.dat table8.dat
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Bytes Format Units Label Explanations
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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
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 --- Class Optical morphology in the APM catalog (1)
30- 34 F5.2 mag Emag APM E plate magnitude
36- 40 F5.2 mag Omag APM O plate magnitude
42- 46 F5.2 mag (O-E) The O-E color
48- 51 F4.2 mag ExtE Extinction correction applied to E
53- 56 F4.2 arcsec Sep Separation between radio and optical
58- 63 F6.2 mJy 20cm The 20 cm peak flux density from FIRST
65- 70 F6.2 mJy RFlux Integrated flux density from FIRST
72- 75 F4.2 --- P(Q) ? Probability that the candidate is a quasar
(in table8.dat only) (2)
76- 93 A18 --- Notes Notes on the object (see ref.dat file)
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Note (1):
gE = morphology is notstellar on the E plate
gO = morphology is notstellar on the O plate
* = object is stellar on both plates
Note (2): Probability computed using decision trees as described in the text.
All source parameters including color were used. APS objects do not
have values because the APS catalog does not have the APM PSF
parameters used by the classifier.
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Byte-by-byte Description of file: ref.dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- RefCode Reference code from table*.dat
24-143 A120 --- Text Text of notes
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History:
From ApJS electronic edition. FITS spectra from R.L. White.
References:
Moshir, M. M., et al. 1992, Explanatory Supplement to the IRAS Faint
Source Survey, Version 2 (JPL D-10015; Pasadena: JPL)
Veron-Cetty, M.-P., & Veron, P. 1998, A Catalogue of Quasars and
Active Nuclei (8th Ed.; ESO Scientific Rep. 18, 1, See Cat. <VII/215>)
Voges, W., et al., 1996IAUC.6420R...1V
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(End) Greg Schwarz [AAS] 03-May-2000