Multifrequency spectra of a complete sample of radio sources with steep spectra (alpha <-0.5)

The observations of a complete sample of radio sources with spectral indice s alpha < -0.5 (S proportional to v(alpha)) are presented. The sample was s elected from the Zelenchuk Survey at 3.9 GHz, and contains ail sources in t he declination range 4 degrees-6 degrees at Galactic latitudes \b\ > 10 deg rees with 3.9-GHz fluxes exceeding 200 mJy. Accurate flux densities of the sample sources were measured at 0.97, 2.3, 3.9, 7.7, 11.2, and 21.7 GHz. Fo r some of the objects, angular sizes and degrees of polarization are estima ted. The spectra of the sample sources in the frequency range from 0.365-21 .7 GHz are studied.