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J/ApJS/95/345       Second Caltech-Jodrell Bank VLBI Survey. I. (Taylor+ 1994)
The Second Caltech-Jodrell Bank VLBI Survey. I. Observations of 91 of 193
Sources
    Taylor G.B., Vermeulen R.C., Pearson T.J., Readhead A.C.S.,
    Henstock D.R., Browne I.W.A., Wilkinson P.N.
   <Astrophys. J. Suppl. Ser. 95, 345 (1994)>
   =1994ApJS...95..345T      (SIMBAD/NED BibCode)
ADC_Keywords: VLBI ; QSOs ; Radio sources

Keywords: galaxies: structure - quasars: general - radio continuum: galaxies -
          surveys - techniques: interferometric

Abstract:
    We  define the sample for the second Caltech-Jodrell Bank VLBI survey.
    This is  a sample  of 193  flat- or  gigahertz-peaked-spectrum sources
    selected  at 4850 MHz. This paper presents images of 91 sources with a
    resolution of ∼1  mas, obtained  using VLBI  observations at  4992 MHz
    with a global  array. The  remaining images  and the  integrated radio
    spectra will be presented in a forthcoming paper by Henstock et al.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        84      193   The CJ2 sample
table2            64       19   Telescope characteristics
table3.dat        66       91  *Map parameters
table4            64      208   Gaussian models
fig/*              0      119   Directory of FITS images corresponding to
                                 the maps in Figure 2 of the printed paper


Note to table3.dat: table3 list the FWHM contours of the Gaussian beam of the
 figures.

See also:
   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/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-  8  A8     ---     Source   B1950 source name according to IAU convention
   9- 11  I3     h       RAh     *Right ascension, J2000
  12- 14  I3     min     RAm      Right ascension, J2000
  15- 23  F9.5   s       RAs      Right ascension, J2000
      24  A1     ---     DE-      Declination sign, always blank
  25- 26  I2     deg     DEd      Declination, J2000
  27- 29  I3     arcmin  DEm      Declination, J2000
  30- 37  F8.4   arcsec  DEs      Declination, J2000
  38- 43  F6.3   Jy      S80cm   *[]? Total flux density at 80 cm
  44- 49  F6.3   Jy      S20cm   *[]? Total flux density at 20 cm
  50- 55  F6.3   Jy      S6cm    *Total flux density at 6 cm
  56- 61  F6.3   Jy      S3.6cm  *Total flux density at 3.6 cm
  63- 64  A2     ---     IDopt   *Optical identification
  65- 69  F5.1   mag     Rmag    *[]? Apparent R magnitude
      70  A1     ---     n_z      [f] Indicates a featureless spectrum
  71- 75  F5.3   ---     z       *[]? Redshift
  77- 84  A8     ---     Date     Date of VLBI observations


Note to RAh:
  The position for one source 0256+424 was off in Patnaik et al.
  (1992MNRAS.254..655P) and as reproduced in the text. In this table the
  correct position is reported. Accuracy is ∼12 mas, except for
  0256+424 for which the accuracy is ∼100 mas.

Note to S80cm:
  Total flux density at 80cm from J. Douglas, private communication.

Note to S20cm:
  Total flux density at 20cm from White & Becker (1992) Cat. VIII/17

Note to S6cm:
  Total flux density at 6cm from Gregory & Condon (1991) Cat. VIII/14

Note to S3.6cm:
  Total flux density at 3.6cm from Kuhr et al. (1981AJ.....86..854K)
  or JVAS (Patnaik et al. 1992MNRAS.254..655P)

Note to IDopt:
  Optical identification from automated scanning of the POSS plates
  or by eye.
  Key to identifications:
  Q - Quasar
  G - Galaxy
  BL - BL Lac object
  EF - Empty Field
  BS - Blue stellar object
  BO - Blue object
  RS - Red stellar object
  RO - Red object
  NS - Neutral stellar object
  NO - Neutral object

Note to Rmag:
  Apparent R magnitude of the object obtained by automated scanning of
  the POSS E plates. The rms error is 0.3 down to magnitude 19.5 and
  increases to 0.5 by magnitude 20.0.

Note to z:
  Redshifts primarily from Veron-Cetty and Veron 1993, ESO Scientific
  Report No. 13 Cat. VII/166

Byte-by-byte Description of file: table2

   Bytes Format Units   Label     Explanations

   1- 12  A12   ---     Tel       Telescope name
  14- 15  A2    ---     Code      Code used (1)
  17- 37  A21   ---     Loc       Location of each telescope
  39- 41  I3    m       Diam      Diameter of each telescope
      42  A1    ---     n_Diam    [x] x when two values
  43- 44  I2    m       Diam2     ? Diameter when two values
      46  A1    ---     Jun1992   ["] Session Jun 1992 success (2)
      48  A1    ---     Sep1992   ["] Session Sep 1992 success (2)
      50  A1    ---     Mar1993   ["] Session Mar 1993 success (2)
  52- 54  I3    K       TsysK     System temperature in K (3)
  56- 58  I3    Jy      TsysJy    System temperature in Jy (3)
  60- 64  F5.3  K/Jy    Sens      Sensitivity of the system

Note (1): B = Max-Planck-Institut fur Radioastronomie
          O = Onsaa Space Observatory
          W = Westerbork Synthesis Radio Telescoper, NFRA
      J2, C = Nuffield Radio Astronomy Laboratories
       L, N = Instituto di Radioastronomia
          G = National Radio Astronomy Observatory
          K = Haystack Observatory
      BR,FD,HN,KP,LA,NL,OV,PT,SC = National Radio Astronomy Observatory VLBA
          Y = National Radio Astronomy Observatory VLA
Note (2): " indicates whether the telescope participated successfully
             in that session.
Note (3): The values quoted are representative of the three sessions.
           The VLA was used in single-antenna mode.


Byte-by-byte Description of file: table3.dat

   Bytes Format  Units Label       Explanations

   1-  8  A8     ---   Source      B1950 source name according to IAU convention
  10- 17  A8     ---   Date        Date of VLBI observation
  18- 20  I3     min   Dur         Duration on source of VLBI observation
  21- 25  F5.2   mas   a           ? FWHM of major axis of the restoring beam
  26- 30  F5.2   mas   b           ? FWHM of minor axis of the restoring beam
  31- 34  I4     deg   PA          [-76/69]? Position angle of major axis,
                                     north through east
  35- 39  I5     mJy   S4.85GHzn  *? Peak flux density, naturally weighted map
  40- 45  F6.2   mJy  e_S4.85GHzn *? Off source rms, naturally weighted map
  46- 50  F5.2   %     S4.85GHznC  ? First contour, percent of peak flux density
  51- 55  I5     mJy   S4.85GHzt  *? Peak flux density, tapered map
  56- 61  F6.2   mJy  e_S4.85GHzt *? Off source rms, tapered map
  62- 66  F5.2   %     S4.85GHztC  ? First contour, % of peak flux density

Note on S4.85GHzn, e_S4.85GHzn, S4.85GHzt, e_S4.85GHzt: Data are in mJy/beam



Byte-by-byte Description of file: table4

   Bytes Format  Units   Label    Explanations

   1-  8  A8     ---     CJ2      B1950 source name according to IAU convention
   9- 14  F6.3   Jy      S        Flux density of component
  15- 21  F7.2   mas     Rad     *Radius of component
  22- 28  F7.1   deg     Theta   *Angle to component
  29- 34  F6.2   mas     a        FWHM of major axis of component
  35- 39  F5.2   ---     b/a      Axial ratio of major to minor axis, b/a
  40- 46  F7.1   deg     Phi      Position angle of major axis,
                                   North through East
  47- 52  F6.3   ---     Amp      []? Amplitude agreement factor
  53- 58  F6.3   ---     Phase    []? Closure phase agreement factor
  59- 64  F6.3   ---     Total    []? Total agreement factor


Note to Rad:
  Radius of component, measured from position of first component.

Note to Theta:
  Angle to component, measured North through East from the position of
  the first component.

Historical Notes:
  * 29-Apr-1997: table2 added at CDS (J. Marcout, CDS)

Origin: AAS CD-ROM series, Volume 4, 1995           Lee Brotzman [ADS] 07-May-95

(End)                           James Marcout, Patricia Bauer [CDS]  24-Oct-1996