/ftp/cats/VIII/40



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VIII/40            GB6 catalog of radio sources        (Gregory+ 1996)
The following files can be converted to FITS (extension .fit .fgz or .fiZ)
	gb6.dat b1950.dat j2000.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=VIII/40
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drwxr-xr-x 112 cats archive 4096 Nov 7 15:27 [Up] drwxr-xr-x 2 cats archive 328 Jan 13 2023 [TAR file] -rw-r--r-- 1 cats archive 472 Dec 19 2022 .message -r--r--r-- 1 cats archive 9459 Feb 6 2004 ReadMe -rw-r--r-- 1 cats archive 1677 Sep 15 2011 +footg5.gif -rw-r--r-- 1 cats archive 22377 Mar 5 2008 +footg8.gif -r--r--r-- 1 cats archive 2217743 Jan 2 1997 b1950.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 3011289 Feb 6 2004 gb6.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 2216978 Jan 2 1997 j2000.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : VIII/40 GB6 catalog of radio sources (Gregory+ 1996) ================================================================================ The GB6 catalog of radio sources Gregory P.C., Scott W.K., Douglas K., Condon J.J. <Astrophys. J. Suppl. Ser. 103, 427 (1996)> =1996ApJS..103..427G ================================================================================ ADC_Keywords: Radio sources Keywords: catalogs - radio continuum: galaxies - surveys Abstract: The Green Bank 4.85GHz (lambda 6cm) survey was made with the NRAO seven-beam receiver on the (former) 91m telescope during 1986 November and 1987 October. The final set of sky maps covering the declination band 0deg<Dec.<+75deg was constructed with data from both epochs. Its noise and position errors are nearly a factor of 2^(1/2)^ smaller than in the epoch 1987 maps, from which the 87GB catalog VIII/14 of 54,579 sources stronger than S 25mJy was extracted. Therefore, we used the new maps to make the GB6 catalog of 75,162 discrete sources with angular sizes phi<=10.5arcmin and flux densities S>=18mJy. This catalog is available in machine-readable versions with either B1950 or J2000 positions and as a printed book with B1950 positions. The GB6 weighted differential source counts S^(5/2)n(S) between 18 mJy and 7Jy agree well with evolutionary models based on independent data. Description: The final set of sky maps from the Green Bank 4.85 GHz survey (Condon J.J., Broderick J.J., Seielstad G.A., Douglas K., & Gregory P.C. in 1994AJ....107.1829C) was used to construct the GB6 Catalog of sources stronger than S   18 mJy in the declination range 0deg < Dec. < +75deg (Gregory P.C., Scott W.K., Douglas K., & Condon J.J. in 1996ApJS..103..427G). There are two machine-readable versions of the GB6 catalog, with coordinates precessed to B1950 (file b1950.dat) and J2000 (file j2000.dat). Each catalog file contains one line per source (75,162 lines each), and the sources are sorted by increasing B1950 or J2000 right ascension.