A sample of ultra steep spectrum sources selected from the Westerbork In the Southern Hemisphere (WISH) survey

被引：79

作者：

De Breuck, C

Tang, Y

de Bruyn, AG

Röttgering, H

van Breugel, W

机构：

[1] Inst Astrophys Paris, F-75014 Paris, France

[2] ASTRON, NL-7990 AA Dwingeloo, Netherlands

[3] Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands

[4] IGPP LLNL, Livermore, CA 94550 USA

[5] Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 394卷 / 01期

关键词：

surveys; radio continuum : general; radio continuum : galaxies; galaxies : active;

D O I：

10.1051/0004-6361:20021115

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The 352 MHz Westerbork In the Southern Hemisphere (WISH) survey is the southern extension of the WENSS, covering 1.60 sr between -9degrees < delta < -26degrees to a limiting flux density of similar to18 mJy (5sigma). Due to the very low elevation of the observations, the survey has a much lower resolution in declination than in right ascension (54" x 54" cosec delta). 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.

引用

页码：59 / 69

页数：11

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