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J/ApJS/131/95 VSOP 5 GHz continuum survey (Fomalont+, 2000)
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The VSOP 5 GHz continuum survey: the prelaunch VLBA observations.
Fomalont E.B., Frey S., Paragi Z., Gurvits L.I., Scott W.K., Taylor A.R.,
Edwards P.G., Hirabayashi H.
<Astrophys. J. Suppl. Ser. 131, 95 (2000)>
=2000ApJS..131...95F (SIMBAD/NED BibCode)
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ADC_Keywords: Galaxies, radio ; Surveys
Keywords: galaxies: active - radio continuum: galaxies - surveys
Abstract:
We have imaged with milliarcsecond resolution at 5 GHz 374 strong
flat-spectrum radio sources north of declination -44{deg} using the
VLBA in 1996 June. The source sample was compiled from the source list
for the VLBI Space Observatory Programme (VSOP) Survey Program. About
250 of the sources observed with the VLBA had correlated flux
densities >=0.3 Jy on the longest VLBA baseline and these sources are
currently being observed with VSOP at 5 GHz. This paper presents the
results from the VLBA prelaunch observations: the correlated flux
density dependence with u-v distance; the contour display of the
images; the model fit parameters for each radio component; and
improved positions for 62 sources. Comparisons and extensive
cross-referencing with other major VLBI surveys are also given.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 98 374 The 5 GHz VLBA Prelaunch (VLBApls) Source List
table2.dat 63 930 Source Component Parameters
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See also:
VIII/52 : The MIT-Green Bank 5GHz Survey (Bennett+, 1986-91)
VIII/14 : 87GB Catalog of radio sources (Gregory et al., 1991)
VIII/40 : GB6 catalog of radio sources (Gregory+ 1996)
J/ApJS/75/801 : MGIV (Fourth MIT-Green Bank) 5GHz Survey (Griffith+ 1991)
VIII/38 : The Parkes-MIT-NRAO 4.85GHz (PMN) Surveys (Griffith+ 1993-1996)
J/AJ/77/797 : NRAO 5GHz Strong Source Survey (Pauliny-Toth+ 1972)
J/ApJS/98/1 : First Caltech-Jodrell Bank VLBI Survey. I. (Polatidis+ 1995)
J/ApJS/98/33 : First Caltech-Jodrell Bank VLBI Survey. II. (Thakkar+ 1995)
J/ApJS/99/297 : First Caltech-Jodrell Bank VLBI Survey. III (Xu+ 1995)
J/ApJS/95/345 : Second Caltech-Jodrell Bank VLBI Survey. I. (Taylor+ 1994)
J/ApJS/100/1 : Second Caltech-Jodrell Bank VLBI Survey. II. (Henstock+ 1995)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name IAU source name (based on J2000 position)
13- 20 A8 --- CName Common name
23- 24 I2 h RAh Right Ascension (J2000)
26- 27 I2 min RAm Right Ascension (J2000)
29- 35 F7.4 s RAs Right Ascension (J2000)
37 A1 --- f_RAs [*] Indicates a positional accuracy of 10 mas
40 A1 --- DE- Sign of the Declination (J2000)
41- 42 I2 deg DEd Declination (J2000)
44- 45 I2 arcmin DEm Declination (J2000)
47- 52 F6.3 arcsec DEs Declination (J2000)
55- 59 F5.1 Jy S5GHz Flux density at 5GHz from finding catalogs
63- 65 I3 deg GLAT Galactic latitude
69 A1 --- OCount Optical counterpart (1)
73 A1 --- l_z Limit flag on the redshift
74- 78 F5.3 --- z ? Redshift (2)
82 A1 --- 5GHz [gc] Other 5 GHz observations (3)
85 A1 --- 1.6GHz [l] Indicates a 1.6 GHz VLBI image in the CJ
survey (Polandis, 1995, Cat. <J/ApJS/98/1>)
88 A1 --- Image [nNv] Other 2.3 and/or 8.4 GHz
observations (4)
91 A1 --- 15GHzU [uU] Single (u) or multiple (U) epoch 15 GHz
VLBI images exist in the USNO database
94 A1 --- 15GHzK [uU] Single (u) or multiple (U) epoch 15 GHz
VLBI images exist in Kellermann et al.
(1998AJ....115.1295K)
97 A1 --- q_Name Quality flag for the object (5)
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Note (1): Optical counter part:
Q = Quasar
B = BL Lac object
E = Empty field or unidentified optical counterpart.
G = Radio galaxy or other type of AGN other than B and Q
(e.g. Seyfert galaxy).
Note (2): Redshift and optical identification are according to Veron-Cetty &
Veron (1998, see Cat. <VII/215>) for Q and B objects and some G unless
otherwise stated in the comments (see last column and Section 4 of the
paper). For several sources identified as G, redshift value is from
NED.
Note (3): 5GHz observations:
c = Caltech-Jodrell Bank Flat Spectrum (CJF) survey
(Taylor et al., 1996ApJS..107...37T)
g = Other published images in
Gurvits, Kellermann & Frey (1999, Cat. <J/A+A/342/378>).
Note (4): 2.3 and/or 8.4 GHz observations:
n = Single epoch observation in the USNO Radio Reference Frame Image
Database.
N = Multiple epoch observations in the USNO Radio Reference Frame Image
Database.
v = VLBA Calibrators database
Note (5): Quality flags:
No entry = Image is of good quality and presented in Figure 2, with the
source model in Table 2.
"=" = Source was very resolved and only a correlated flux density versus
u-v spacing plot is shown in Figure 3.
x = A comment is also given for this source in Section 4 of the paper.
# = Source was not detected and is probably fully resolved with VLBA
resolution.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name IAU source name
14- 19 F6.3 Jy FluxDen Total flux density of the component
22- 26 F5.1 mas EWPos East-west offset from reference position
29- 33 F5.1 mas NSPos North-south offset from reference position
36 A1 --- l_MajDiam Limit flag on MajDiam
37- 40 F4.1 mas MajDiam The FWHM angular size of major diameter
43- 45 F3.1 mas e_MajDiam ? Uncertainty in MajDiam
49 A1 --- l_MinDiam Limit flag on MinDiam
50- 53 F4.1 mas MinDiam The FWHM angular size of minor diameter
56- 58 F3.1 mas e_MinDiam ? Uncertainty in MinDiam
61- 63 I3 deg PA ? Position angle of the major axis
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History:
From electronic version
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(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 24-Jan-2001