Radio-optical identification of very-steep spectrum radio sources from the UTR-2 catalogue

Details Radio-optical identification of very-steep spectrum radio sources from the UTR-2 catalogue Radio-optical identification of very-steep spectrum radio sources from the UTR-2 catalogue

2000-01-27

arxiv.org/abs/astro-ph/0001473v1

Astronomy and Astrophysics

Astrophysics

7 pages, 5 figures. This was the poster as presented on IAU Symp 199. The short (final) version was submitted the Symp. Procee

Scientific paper

We used radio source catalogues accessible from the CATS database (http://cats.sao.ru) to establish radio continuum spectra for decametric radio sources in the UTR-2 catalogue (Braude et al., 1978--1994). From these, we select a sample of 23 sources with ultra steep radio spectra (\alpha<=-1.2, S ~ \nu^{\alpha}) and present accurate positions and sizes from FIRST and NVSS. The search for optical counterparts from the APM (object) and DSS (image) databases, as well as infrared and X-ray identifications of these UTR sources are in progress.

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