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1994ApJS...95..345Taylor+
1995ApJS...98....1Henstock
See also Caltech-Jodrell Bank VLBI Survey I
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.
   
   =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/*            .        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   ---     S80cm   *[]? Total flux density at 80 cm
  44-49   F6.3   ---     S20cm   *[]? Total flux density at 20 cm
  50-55   F6.3   ---     S6cm    *Total flux density at 6 cm
  56-61   F6.3   ---     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. 
Note to S6cm:
  Total flux density at 6cm from Gregory & Condon (1991) Cat. 
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. 
--------------------------------------------------------------------------------

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
J/ApJS/100/1    Second Caltech-Jodrell Bank VLBI Survey. II.  (Henstock+ 1995)
================================================================================
The Second Caltech-Jodrell Bank VLBI Survey. II. Observations of 102 of 193
Sources
    Henstock D.R., Browne I.W.A., Wilkinson P.N., Taylor G.B.,
    Vermeulen R.C., Pearson T.J., Readhead A.C.S.
   
   =1995ApJS..100....1H      (SIMBAD/NED BibCode)
================================================================================
ADC_Keywords: VLBI ; QSOs ; Radio sources
Keywords: galaxies: structure - quasars: general - radio continuum: galaxies -
          surveys - techniques: interferometric

Description:
    This is the second of two papers presenting the Second Caltech-
    Jodrell Bank VLBI survey (CJ2). The CJ2 sample consists of 193 flat-
    and gigahertz-peaked-spectrum sources selected at 4850 MHz. In this
    paper we present images of the remaining 102 sources with ~1 mas
    resolution, obtained using VLBI snapshot observations at 4992 MHz with
    a global array. We also present integrated radio spectra for the
    entire CJ2 sample.

File Summary:
--------------------------------------------------------------------------------
 FileName    Lrecl    Records    Explanations
--------------------------------------------------------------------------------
ReadMe          80          .    This file
table2.dat      66        102    Map parameters
table3          64        254    Gaussian models
fig/*            .         51    Maps in FITS format
--------------------------------------------------------------------------------

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/95/345 : Second Caltech-Jodrell Bank VLBI Survey. I. (Taylor+ 1994)

Byte-by-byte Description of file: table2.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
  19- 20  I2     min   Dur         Duration on source of VLBI observation
  22- 25  F4.2   mas   a           FWHM of major axis of the restoring beam
  27- 30  F4.2   mas   b           FWHM of minor axis of the restoring beam
  32- 34  I3     deg   PA          [-79/57] Position angle of major axis,
                                             north through east
  36- 39  I4     mJy   S4.85GHzn  *Peak flux density, naturally weighted map
  41- 45  F5.2   mJy e_S4.85GHzn  *Off source rms, naturally weighted map
  47- 50  F4.2   %     S4.85GHznC  First contour, percent of peak flux density
  52- 55  I4     mJy   S4.85GHzt  *? Peak flux density, tapered map
  57- 61  F5.2   mJy e_S4.85GHzt  *? Off source rms, tapered map
  63- 66  F4.2   %     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: table3
--------------------------------------------------------------------------------
  Bytes Format  Units   Label    Explanations
--------------------------------------------------------------------------------
   1-  8  A8     ---     CJ2      B1950 source name according to IAU convention
  10- 14  F5.3   Jy      S        Flux density of component
  16- 21  F6.2   mas     Rad     *Radius of component
  23- 28  F6.1   deg     Theta   *Angle to component
  30- 34  F5.2   mas     a        FWHM of major axis of component
  36- 39  F4.2   ---     b/a      Axial ratio of major to minor axis, b/a
  41- 46  F6.1   deg     Phi      Position angle of major axis,
                                   north through east
  48- 52  F5.3   ---     Amp      []? Amplitude agreement factor
  54- 58  F5.3   ---     Phase    []? Closure phase agreement factor
  60- 64  F5.3   ---     Total    []? Total agreement factor
--------------------------------------------------------------------------------
Note on Rad:
  Radius of component, measured from position of first component.
Note on Theta:
  Angle to component, measured north through east from the position of
  the first component.
--------------------------------------------------------------------------------

Origin: AAS CD-ROM series, Volume 4, 1995           Lee Brotzman [ADS] 10-May-95
================================================================================
(End)                                          Patricia Bauer [CDS]  14-Oct-1996