Issue |
A&A
Volume 386, Number 1, April IV 2002
|
|
---|---|---|
Page(s) | 97 - 113 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361:20020119 | |
Published online | 15 April 2002 |
The Parkes quarter-Jansky flat-spectrum sample*
I. Sample selection and source identifications
1
Research School of Astronomy & Astrophysics, The Australian National University, Mount Stromlo Observatory, Canberra, Australia
2
Department of Astrophysics, University of Oxford, Nuclear and Astrophysics Laboratory, Keble Road, Oxford OX1 3RH, UK
3
European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
4
National Radio Astronomy Observatory, Edgemont Road, Charlottesville, VA 22903-2475, USA
5
Royal Observatory, Blackford Hill, Edinburgh EH3 9HJ, UK
Corresponding author: C. A. Jackson, cjackson@mso.anu.edu.au
Received:
7
November
2001
Accepted:
22
January
2002
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 0.4 where
. The sample covers all right ascensions and the
declination range from
to
, excluding
low galactic latitudes (
) 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.
Key words: catalogues / radio continuum: galaxies / BL Lac objects: general / galaxies: general / quasars: general
© ESO, 2002
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