2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/453We 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.7 pages, 5 figures. This was the poster as presented on IAU Symp 199. The short (final) version was submitted the Symp. ProceedingsAstrophysicstext