Astronomy and Astrophysics – Astronomy
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005arep...49..374a&link_type=abstract
Astronomy Reports, vol. 49, Issue 5, p.374-389
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We present optical identifications, classifications, and radio spectra for 19 radio sources from a complete sample in flux density with declinations 10° 12°30′ (J2000) obtained with the 6-m optical telescope (4000 9000 Å) and RATAN-600 radio telescope (0.97 21.7 GHz) of the Special Astrophysical Observatory. Twelve objects with redshifts from 0.573 to 2.694 have been classiffied as quasars, and two objects with featureless spectra as BL Lac objects. Four objects are emission-line radio galaxies with redshifts from 0.204 to 0.311 (one also displaying absorption lines), and one object is an absorption-line galaxy with a redshift of 0.214. Radio flux densities have been obtained at six frequencies for all the sources except for two extended objects. The radio spectra of five of the sources can be separated into extended and compact components. Three objects display substantial rapid (on time scales from several days to several weeks) and long-term variability of their flux densities.
Afanas'ev V. L.
Dodonov Serguei N.
Gorshkov A. G.
Konnikova V. K.
Mingaliev Marat G.
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