A strong emission line at 6703Åhas been detected in the optical spectrum for the host galaxy (R=23.1) of the radio source RC J0311+0507 (4C+04.11). This radio galaxy, with a spectral index of 1.31 in the frequency range 365-4850 MHz, is one of the ultrasteep spectrum objects from the deep survey of a sky strip conducted with RATAN-600 in 1980RATAN-600 in -1981 We present arguments in favor of the identification of this line with Lyα at redshift z = 4.514. In this case, the object belongs to the group of extremely distant radio galaxies of ultrahigh radio luminosity (P 1400 = 1.3 × 10 29 W Hz −1 ). Such power can be provided only by a fairly massive black hole (∼ 10 9 M ⊙ ) that formed in a time less than the age of the Universe at the observed z (1.3 Gyr) or had a primordial origin.

No abstract

No abstract

No abstract

We present the results of spectroscopy of 71 objects with steep and ultra-steep spectra (α < −0.9, S ∝ ν α ) from the "Big Trio" (RATAN-600-VLA-BTA) project, performed with the "Scorpio" spectrograph on the 6-m telescope of the Special Astrophysical Observatory (Russian Academy of Sciences). Redshifts were determined for these objects. We also present several other parameters of the sources, such as their Rmagnitudes, maximum radio sizes in seconds of arc, flux densities at 500, 1425, and 3940 MHz, radio luminosities at 500 and 3940 MHz, and morphology. Of the total number of radio galaxies studied, four have redshifts 1 < z < 2, three have 2 < z < 3, one has 3 < z < 4,and one has z = 4.51. Thirteen sources have redshifts 0.7 < z < 1 and 15 have 0.2 < z < 0.7. Of all the quasars studied, five have redshifts 0.7 < z < 1, seven have 1 < z < 2, four have 2 < z < 3, and one has z = 3.57. We did not detect any spectral lines for 17 objects.