Access to Astronomical Catalogues

← Click to display the menu
J/ApJS/131/95       VSOP 5 GHz continuum survey              (Fomalont+, 2000)

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
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° 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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 98 374 The 5 GHz VLBA Prelaunch (VLBApls) Source List table2.dat 63 930 Source Component Parameters
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
Bytes Format Units Label Explanations
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)
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.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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
History: From electronic version
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 24-Jan-2001
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

catalogue service