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Detailed Description of J/MNRAS/294/607 :
7C(G) 151MHz survey of the Galactic plane (Vessey+ 1998)

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Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.
J/MNRAS/294/607         7C(G) 151MHz survey of the Galactic plane (Vessey+ 1998)
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The 7C(G) survey of radio sources at 151MHz - the Galactic plane at
80deg<l<104deg and 126deg<l<180deg, for |b|<5.5deg.
       Vessey S.J., Green D.A.
      <Mon. Not. R. Astron. Soc. 294, 607 (1998)>
      =1998MNRAS.294..607V
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ADC_Keywords: Surveys ; Radio sources

Keywords: catalogues - surveys - radio continuum: general


Abstract:
    Results form a survey of the northern Galactic plane (at
    declination >=30° at 151MHz made with the Cambridge Low Frequency
    Synthesis Telescope are presented. This survey is designated 7C(G) -
    i.e. the Galactic portion of the ongoing 7C surveys. This covers the
    regions 80°<l<104° and 126°<l<180°, for |b|<=5.5°,
    and has some coverage to |b|~9°, with a resolution of
    ~70x70cosec{delta}arcsec2 (RAxDec). The observations, data reduction
    and calibration of this survey are described, and a catalogue of 6262
    compact sources, with a completeness limit of ~0.25Jy over most of the
    survey region, is presented. The catalogue has an rms positional
    accuracy of better than 10arcsec, and the flux densities are tied to
    the scale of Roger, Bridle & Costain (1973AJ.....78.1030R) with an
    accuracy of better than 10 per cent.

File Summary:


       FileName      Lrecl  Records   Explanations


×                   80        .   This file
× ReadMe            80        .   This file
× 7cg.dat           85     6262   7C(G) catalogue



See also:
  VIII/84 : A final non-redundant catalogue for 7C 151-MHz survey (Hales+ 2007)
  J/MNRAS/282/779 : 7C 151-MHz survey of region 9-16h 20-35deg (Waldram+ 1996)


Byte-by-byte Description of file:  7cg.dat


   Bytes Format Units   Label     Explanations


   1-  2  I2    h       RAh       Beam fitted position right ascension (B1950.0) (1)
   4-  5  I2    min     RAm       Beam fitted position right ascension (B1950.0)
   7- 10  F4.1  s       RAs       Beam fitted position right ascension (B1950.0)
      12  A1    ---     DE-       Beam fitted position declination sign
  13- 14  I2    deg     DEd       Beam fitted position declination (B1950.0)
  16- 17  I2    arcmin  DEm       Beam fitted position declination (B1950.0)
  19- 20  I2    arcsec  DEs       Beam fitted position declination (B1950.0)
  23- 24  I2    h       RACh      Centroid position right ascension (B1950.0) (2)
  26- 27  I2    min     RACm      Centroid position right ascension (B1950.0)
  29- 32  F4.1  s       RACs      Centroid position right ascension (B1950.0)
      34  A1    ---     DEC-      Centroid position declination sign
  35- 36  I2    deg     DECd      Centroid position declination (B1950.0)
  38- 39  I2    arcmin  DECm      Centroid position declination (B1950.0)
  41- 42  I2    arcsec  DECs      Centroid position declination (B1950.0)
  45- 50  F6.2  deg     GLON      Galactic longitude of the beam-fitted position
  52- 56  F5.2  deg     GLAT      Galactic latitude of the beam-fitted position
  58- 63  F6.3  Jy      S(bf)     Beam fitted flux density (3)
  65- 70  F6.3  Jy      S(in)     Integrated flux density
  72- 75  F4.1  ---     S/N       Signal-to-noise ratio
  77- 81  F5.2  ---     Size      Extent of the source size in units of the local
                               beam area
      83  I1    ---     Peaks     ? Number of individual peaks that where included
                                in the flux integration
      85  A1    ---     n_Peaks   [MC] The source is the main (M) or a component
                                   (C) peak in the integration


Note (1): The rms accuracies are 5arcsec in RA and 7arcsec in DE

Note (2): Multiple peaks integrated together have the same centroid position

Note (3): Thew beam-fitted value is the preferred flux density unless
          the source is clearly extended, in which case the integrated
          flux density should be used.



History:
    From http://www.mrao.cam.ac.uk/surveys/7C_G
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(End)                                          Patricia Bauer [CDS]  03-Apr-1998