Volume 394, Number 1, October IV 2002
|Page(s)||59 - 69|
|Section||Cosmology (including clusters of galaxies)|
|Published online||04 October 2002|
A sample of ultra steep spectrum sources selected from the Westerbork In the Southern Hemisphere (WISH) survey*
Institut d'Astrophysique de Paris, 98bis boulevard Arago, 75014 Paris, France e-mail: firstname.lastname@example.org
2 ASTRON, Postbus 2, 7990 AA Dwingeloo, The Netherlands e-mail: tang,email@example.com
3 Kapteyn Astronomical Institute, PO Box 800, 9700 AV Groningen, The Netherlands
4 Sterrewacht Leiden, Postbus 9513, 2300 RA Leiden, The Netherlands e-mail: firstname.lastname@example.org
5 IGPP/LLNL, L-413, 7000 East Ave, Livermore, CA 94550, USA e-mail: email@example.com
Corresponding author: C. De Breuck, firstname.lastname@example.org
Accepted: 1 August 2002
The 352 MHz Westerbork In the Southern Hemisphere (WISH) survey is the southern extension of the WENSS, covering 1.60 sr between to a limiting flux density of ~18 mJy (). Due to the very low elevation of the observations, the survey has a much lower resolution in declination than in right ascension (). A correlation with the 1.4 GHz NVSS shows that the positional accuracy is less constrained in declination than in right ascension, but there is no significant systematic error. We present a source list containing 73570 sources. We correlate this WISH catalogue with the NVSS to construct a sample of faint Ultra Steep Spectrum (USS) sources, which is accessible for follow-up studies with large optical telescopes in the southern hemisphere. This sample is aimed at increasing the number of known high redshift radio galaxies to allow detailed follow-up studies of these massive galaxies and their environments in the early Universe.
Key words: surveys / radio continuum: general / radio continuum: galaxies / galaxies: active
© ESO, 2002
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