The Parkes quarter-Jansky flat-spectrum sample (Jackson+, 2002)

Details The Parkes quarter-Jansky flat-spectrum sample (Jackson+, 2002) The Parkes quarter-Jansky flat-spectrum sample (Jackson+, 2002)

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ycat..33860097j&link_type=abstract

VizieR On-line Data Catalog: J/A+A/386/97. Originally published in: 2002A&A...386...97J

Computer Science

Qsos, Radio Sources, Galaxy Catalogs

Scientific paper

We present a new sample of quarter-Jansky flat-spectrum radio sources selected to search for high-redshift quasars and to study the evolution of the flat-spectrum quasar population. The sample comprises 878 radio sources selected from the Parkes catalogues with spectral indices α5GHz2.7GHz>=-0.4 where Snu{prop.to}νalpha. The sample covers all right ascensions and the declination range from -80.0° to +2.5°, excluding low galactic latitudes (|b|<10°) and the Magellanic Cloud regions. We have obtained improved radio source positions, firstly to reconfirm the majority of the existing identifications, and secondly, using digitized sky-survey data and deep B, Gunn-i and Gunn-z CCD-imaging, to find optical identifications for 223 previously-unidentified sources. We present the final catalogue of 878 flat-spectrum sources: 827 are compact radio sources identified with galaxies, quasars and BL Lac objects, 38 have either extended radio structure or are identified with Galactic objects (PN, HII or non-compact radio source), 4 are obscured by Galactic stars, and 9 (1 per cent of the total sample) remain unidentified. (3 data files).

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