ACDS V10.0 - Detailed Description of VIII/13

ACDS V10.0 - Sun Jan 19 06:01:51 CET 2025

| # Detailed Description of VIII/13 : A new catalog of 53522 4.85GHz sources (Becker+ 1991) |

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.

    VIII/13      A new catalog of 53522 4.85GHz sources    (Becker+ 1991)
    ================================================================================
    A new catalog of 53522 4.85GHz sources
         Becker R.H., White R.L., Edwards A.L.
        <Astrohys. J., Suppl. Ser. 75, 1-229 (1991)>
        =1991ApJS...75....1B
    ================================================================================
    ADC_Keywords: Radio sources

    Abstract of paper:
        A catalog of 53522 4.85GHz sources between 0 and 75 degrees
        declination has been generated from observations taken with the NRAO
        Green Blank 300foot (91m) telescope. The flux limit of the catalog is
        dependent on declination and ranges from about 40mJy at 0degree to
        20mJy at 60degrees. The source positions given in the catalog have a
        95% confidence radius of about 50arcsec. Spectral indices have been
        calculated for 29051 sources which have counterparts in the Texas
        365MHz northern sky survey.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × catalog.dat       44    53522   The catalogue of radio sources

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

       Bytes Format  Units   Label    Explanations

       1- 10  A10    ---     Name     6-cm Name, constructed from position
                                        HHMM+DDSS, with A or B added at end
                                        if needed to make name unique
      12- 13  I2     h       RAh      Right Ascension B1950 (hours)
      15- 16  I2     min     RAm      Right Ascension B1950 (minutes)
      18- 21  F4.1   s       RAs      Right Ascension B1950 (seconds)
          23  A1     ---     DE-      Declination B1950 (sign)
      24- 25  I2     deg     DEd      Declination B1950 (degrees)
      27- 28  I2     arcmin  DEm      Declination B1950 (minutes)
      30- 31  I2     arcsec  DEs      Declination B1950 (seconds)
      32- 37  I6     mJy     Flux     Flux density at 4.85GHz (mJy) (peak flux
                                       density for point sources, and integrated
                                       flux density for extended sources)
          38  A1     ---     extFlag  [*] "*" if source is extended, else blank
      40- 43  F4.1   ---     SpIndex  [-2/1.5]? Spectral index between 4.85GHz
                                        and 0.365GHz (1)
          44  A1     ---   n_SpIndex  [*] "*" if separation between 4.85GHz and
                                        0.365GHz positions is greater than
                                        100 arcsec, else blank

    Note (1): The spectral index {alpha} is    d(log(Flux))/d(log(Frequency))
            i.e.    F{nu} {proportional.to} {nu}{alpha}
       The 365GHz flux is from Texas survey, Douglas et al., private comm.

    FORTRAN reading:
        The following Fortran statements can be used to read the file:

          character name*10, decsgn*1, extflg, widflg
          integer rah, ram, decd, decm, decs, flux
          real rass, spind
          read(10,1) name, rah, ram, ras, decsgn, decd, decm, decs,
         &   flux, extflg, spind, widflg
      1   format(a10,1x,i2, 1x, i2, 1x, f4.1, 1x, a1, i2, 1x, i2, 1x, i2,
         &   i6, a1, 1x, f4.1, a1)

    Historical Notes:
      * 21-Jul-1992: Received from ADC
      * 02-May-1995: documentation standardized
    ================================================================================
    (End)                                    Francois Ochsenbein [CDS]   02-May-1995