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

H. Andernach·O. V. Verkhodanov·N. V. Verkhodanova
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Abstract

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 (α<=-1.2, S ~ ν^α) 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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H. Andernach, O. V. Verkhodanov, N. V. Verkhodanova. 2000-01-27. Radio-optical identification of very-steep spectrum radio sources from the UTR-2 catalogue. https://arxiv.org/abs/astro-ph/0001473

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