ACDS V10.0 - Tue Apr 23 01:12:34 CEST 2019
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Detailed Description of VIII/13 : A new catalog of 53522 4.85GHz sources (Becker+ 1991)
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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.
VIII/13 A new catalog of 53522 4.85GHz sources (Becker+ 1991)
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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
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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
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(End) Francois Ochsenbein [CDS] 02-May-1995