ADC/CDS Standard Document for Catalog:
/catalogs/8/8014/

1. Use the ADC Data Viewer Suite to visualize the data.
2. Get the data files via anonymous FTP. (See Note.)

II/14     87GB Catalog of radio sources                 (Gregory et al., 1991)
================================================================================
The 87GB Catalog of Radio Sources Covering 0 to +75degree at 4.85 GHz
     Gregory P.C., Condon J.J.
     <Astrophys. J. Suppl. Ser. 75, 1011-1291 (1991)>
     =1991ApJS...75.1011G
================================================================================
ADC_Keywords: Radio sources

Description:
    The 54579 sources of the 87GB catalogue are stored in two files,
    with B1950 coordinates (b1950.dat) and J2000 coordinates (j2000.dat).
    On Unix workstations, a simple fold command can be used to transform the 
    FITS files into plain ascii files with format:

Abstract:
    The 91m telescope in Green Blank was used during 1987 October to map
    6.0sr of the sky in the [0,+75]degrees declination band at 4.85GHz. We
    present the 87GB catalog of 54579 discrete sources with angular sizes
    less than about 10.5arcmin and stronger than S about 25mJy derived
    from these maps. The catalog positions and flux densities have been
    corrected for known map biases. Their estimated rms uncertainties were
    verified by comparison with more accurate positions and flux densities
    available for some sources. The 4.85GHz normalized source counts
    S^5/2^.n(S) between 25mJy and 10Jy were obtained and agree well with
    evolutionary models based on independent data.

File Summary:
--------------------------------------------------------------------------------
 FileName    Lrecl    Records    Explanations
--------------------------------------------------------------------------------
ReadMe          80          .    This file
makefile        80         46    Unix Makefile to generate the programs
b1950.dat       80      54579    The 87GB catalogue in B1950 coordinates
j2000.dat       80      54579    The 87GB catalogue in J2000 coordinates
SIMPLE.fih      73         24    Original FITS header
b1950.fih       67        127    Original FITS extension header for b1950.dat
j2000.fih       67        127    Original FITS extension header for j2000.dat
match.f         77        293    Selection program
match.for       77        285    Selection program
notes.txt       80        278    87GB Catalog Description
select.f        73        249    Selection program
select.for      73        248    Selection program
--------------------------------------------------------------------------------

See also:
    VIII/40 : The GB6 catalog of radio sources (Gregory et al., 1996)
              which contains 75,162 sources with flux densities S>=18mJy.

Byte-by-byte Description of file: b1950.dat, j2000.dat
--------------------------------------------------------------------------------
   Bytes Format  Units   Label    Explanations
--------------------------------------------------------------------------------
   1-  2  I2     h       RAh      Right Ascension (hours) (B1950 or J2000)
   3-  4  I2     min     RAm      Right Ascension (minutes) (B1950 or J2000)
   5-  8  F4.1   s       RAs      Right Ascension (seconds) (B1950 or J2000)
  10- 12  F3.1   s       e_RAs    rms uncertainty in RAS (seconds)
      14  A1     ---     DE-      Declination (sign) (B1950 or J2000)
  15- 16  I2     deg     DEd      Declination (degrees) (B1950 or J2000)
  17- 18  I2     arcmin  DEm      Declination (minutes) (B1950 or J2000)
  19- 20  I2     arcsec  DEs      Declination (seconds) (B1950 or J2000)
  22- 23  I2     arcsec  e_DEs    rms uncertainty in DECS
  25- 29  F5.1   deg     GLAT     galactic latitude b2
  31- 35  F5.1   deg     GLON     [0/360] galactic longitude l2
  37- 41  I5     mJy     Flux     4.85 GHz peak flux density
  43- 46  I4     mJy     e_Flux   rms uncertainty in FLUX
      49  A1     ---     Eflag    [E] flag for extended source
      50  A1     ---     Wflag    [W] warning flag
      51  A1     ---     Cflag    [C] flag for confused source
  53- 56  F4.2   ---     MajAxis  normalized major axis of fit
  58- 61  F4.2   ---     MinAxis  normalized minor axis of fit
  63- 65  I3     deg     Angle    fit major-axis PA (degrees E of N)
  67- 69  I3     mJy     Zero     zero-level of fit
  71- 74  I4     ---     PIXX     x-coordinate pixel number
  76- 79  I4     ---     PIXY     y-coordinate pixel number
--------------------------------------------------------------------------------

Historical Notes:
    *30-Nov-1992: First archived at CDS
    *04-Oct-1994: The FITS files have been converted to standard ascii files.
    *02-Feb-2002: j2000.fih, SIMPLE.fih, b1950.fih files removed from 
                  byte-by-byte description. Corrected File summary name 
                  'f2000.fih' to 'j2000.fih' and renamed 'readme.txt' to 
                  'notes.txt'. Corrections by Brian Thomas [ADC]

  Programs:
    Issuing on Unix workstations the command "make" in this directory should 
    normally be enough to generate the search programs and their related data 
    files (these programs use plain ascii files B1950.xxH and J2000.xxH with the
    above format, where xx stands for the hour of right ascension from 00 to 
    23).
================================================================================
(End)    Francois Ochsenbein [CDS]                                   30-Nov-1992