Optical identifications and spectra of radio sources |
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Authors: | V. L. Afanas’ev S. N. Dodonov A. V. Moiseev A. G. Gorshkov V. K. Konnikova M. G. Mingaliev |
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Affiliation: | (1) Special Astrophysical Observatory, Russian Academy of Sciences, Nizhniĭ Arkhyz, Karachaĭ-Cherkessian Republic, 357147, Russia;(2) Sternberg Astronomical Institute, Moscow University, Universitetskiĭ pr. 13, Moscow, 119992, Russia;(3) Southern Federal University (Rostov University), ul. Bol’shaya Sadovaya 105, Rostov-on-Don, 334006, Russia |
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Abstract: | We present classifications, optical identifications, and radio spectra for eight radio sources from three flux-density-complete samples in the following declination ranges: 4°–6° (B1950), S 3.9 > 200 mJy; 10°–12°30′ (J2000), S 4.85 > 200 mJy; 74°?75° (J2000), S 4.85 > 100 mJy. For all these samples, the right ascensions are 0h–24h and the Galactic latitudes, |b| > 15°. Our optical observations at 4000–7500 ° were made with the 6-m telescope of the Special Astrophysical Observatory; we also observed at 0.97–21.7 GHz with the RATAN-600 radio telescope of the Special Astrophysical Observatory. We classify four of the objects as quasars and four as galaxies. Five of the radio sources have power-law spectra at 0.97–21.7 GHz, while two objects have flat spectra. The quasar J2358+0430 virtually did not vary during 23 years. |
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