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Date and Time of the Query: 2019-04-26 T06:44:53 PDT
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For refcode 1996ApJS..103..427G:
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Copyright by American Astronomical Society. Reproduced by permission
1996ApJS..103..427G THE GB6 CATALOG OF RADIO SOURCES P. C. GREGORY, W. K. SCOTT, AND K. DOUGLAS Physics Department, University of British Columbia, Vancouver, BC, V6T 2A6, Canada; gregory@physics.ubc.ca AND J. J. CONDON National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903;jcondon@nrao.edu Received 1995 July 14: accepted 1995 October 12 ABSTRACT The Green Bank 4.85 GHz ({lambda} ~ 6 cm) survey was made with the NRAO seven-beam receiver on the (former) 91 m telescope during 1986 November and 1987 October. The final set of sky maps covering the declination band 0^deg^ < {delta} < +75^deg^ was constructed with data from both epochs. Its noise and position errors are nearly a factor of2^1/2^ smaller than in the epoch 1987 maps, from which the 87GB catalog of 54,579 sources stronger than S ~ 25 mJy was extracted. Therefore, we used the new maps to make the GB6 catalog of 75,162 discrete sources with angular sizes {phi} <= 10.5' and flux densities S >= 18 mJy. 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 7 Jy agree well with evolutionary models based on independent data. Subject headings: catalogs - radio continuum: galaxies - surveys
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