Radio Spectra and NVSS Maps of Decametric Sources

Details Radio Spectra and NVSS Maps of Decametric Sources Radio Spectra and NVSS Maps of Decametric Sources

1997-03-21

arxiv.org/abs/astro-ph/9703142v1

Astronomy and Astrophysics

Astrophysics

2 pages, no figures; to appear in Proc. "Observational Cosmology with the New Radio Surveys", eds. M. Bremer, N. Jackson & I.

Scientific paper

We constructed radio spectra for ~1400 UTR-2 sources and find that 46% of them have concave curvature. Inspection of NVSS maps of 700 UTR sources suggests that half of all UTR sources are either blends of two or more sources or have an ultra-steep spectrum (USS). The fraction of compact USS sources in UTR may be near 10%. Using NVSS and the Digitized Sky Survey(s) we expect to double the UTR optical identification rate from currently ~19%.

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