Access to Astronomical Catalogues

J/A+AS/134/401      4C equatorial sample VLA observations. II. (Jackson+, 1999)
VLA observations of a 4C equatorial sample. II.
    Jackson N., Roland J., Bremer M., Rhee G., Webb J.
   <Astron. Astrophys. Suppl. Ser. 134, 401 (1999)>
   =1999A&AS..134..401J
ADC_Keywords: Radio continuum ; Surveys

Keywords: surveys - galaxies: active - radio continuum: galaxies -
          radio continuum: general

Description:
    VLA observations at 4.9GHz are given for 144 steep-spectrum 4C sources
    whose declinations are between -4° and +4° and whose angular
    sizes are smaller than 30arcsec. The paper contains 150 maps (VLA and
    6 MERLIN observations at 1420 or 1658MHz) which are not included here.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        66      144  *Objects observed, together with the geometry
                                 of the restoring beam.
table2.dat        58      298   Positions and fluxes observed with VLA

Note on table1.dat: source 1039+019 was corrected to read 1039+029



See also:
    1996ApJS..107..175R : VLA imaging of a sample of steep-spectrum
        radio galaxies (Rhee et al.)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1-  8  A8    --      IAUname   Name of source (based on 1950 position)
      10  I1    ---     Epoch     Epoch coded as 1=1994-Jul-08, 2=1994-Jul-30,
                                                 3=1995-Oct-09, 4=1995-Dec-10
  13- 16  F4.2  arcsec  MajAxis   Major axis of the restoring beam
  18- 21  F4.2  arcsec  MinAxis   Minor axis of the restoring beam
  23- 28  F6.2  deg     PA        [-90,+90] Position angle of restoring beam
      30  A1    ---     Problem   [*] indicates a problem, see "History" section
  31- 66  A36   ---     Comment   Comments


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1-  9  A9    ---     4C        4C name (Cat. VIII/4)
  11- 18  A8    ---     IAUname   Name of source (based on 1950 position)
  20- 21  I2    h       RAh       Right Ascension 1950 (hours)
  22- 23  I2    min     RAm       Right Ascension 1950 (minutes)
  24- 28  F5.2  s       RAs       Right Ascension 1950 (seconds)
      29  A1    ---     DE-       Declination 1950 (sign)
  30- 31  I2    deg     DEd       Declination 1950 (degrees)
  32- 33  I2    arcmin  DEm       Declination 1950 (minutes)
  34- 37  F4.1  arcsec  DEs       Declination 1950 (seconds)
      38  A1    ---     Core      [*] indicates the probable core
  40- 45  F6.1  mJy     Fpeak     4860MHz Peak flux density
  47- 52  F6.1  mJy     Ftotal    4860MHz Total (integrated) flux density
  54- 58  F5.1  arcsec  Size      ? Angular size of source


Table 3: Log of Merlin observations
    ------------------------------------------------
    4C name    IAUname    Obs. Date  Obs.Time  Freq.
                                       (hr)    (MHz)
    ------------------------------------------------
    4C+00.15   0421+004  1997-May-14    4.1    1658
    4C+03.14   0852+029  1997-Mar-30    7.2    1420
    4C+00.31   0945+003  1997-Apr-17    8.4    1658
    4C-02.63   1509-023  1997-Mar-26    8.0    1658
    4C-03.65   1738-033  1997-May-14    8.3    1658
    4C+00.80   2200+006  1997-Apr-17    8.0    1420
    ------------------------------------------------

Nomenclature Note:
    Sources are designated [JRB99] in Simbad.

History:
  * May 1999: tables OCR'ed by H.J. Andernach (catalogue R608 in his list).
    The following problems have been encountered (sources flagged '*'
    in column 'Problem' of table1):
    => 0502-023 is only listed in table1, not in table2; table1 remarks a
       "marginal detection" for it, but the map shown on the bottom right
       of p.417 clearly shows a source.
    => 0915+025 is duplicate (in both table1 and table2).
    => 1039+019 was corrected to read 1039+029 to agree with table2
    In addition, Table 3 quotes the additional sources
    4C+00.31=0945+003, 4C-03.65=1738-033, and 4C-02.63 1509-023,
    which are not listed in table 2.
    This makes a total of 147 sources presented in this paper
    (while the abstract states 144).

Acknowledgements:
    It is a pleasure to thank H.J. Andernach for having prepared and
    supplied the tables to CDS.
(End)                                     Francois Ochsenbein [CDS]  12-May-1999