Quasi-simultaneous VLBI and RATAN-600 observations of active galactic nuclei |
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| Authors: | A B Pushkarev Yu Yu Kovalev I E Molotov M B Nechaeva Yu N Gorshenkov G Tuccari C Stanghellini X Hong J Quick S Dougherty X Liu |
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| Institution: | (1) Main Astronomical Observatory, Russian Academy of Sciences, Pulkovo, St. Petersburg, 196140, Russia;(2) National Radio Astronomy Observatory, P.O. Box 2, Rt. 28/92, Green Bank, WV 24944-0002, USA;(3) Astro Space Center of the Lebedev Institute of Physics, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, Russia;(4) Radiophysical Research Institute, ul. Bol'shaya Pecherskaya 25/14, Nizhni Novgorod, 603600, Russia;(5) Special Design Bureau, Power Engineering Institute, Krasnokazarmennaya ul. 14, Moscow, 111250, Russia;(6) Istituto di Radioastronomia del C.N.R., Stazione VLBI di Noto, C. da Renna Bassa—Loc. Case di Mezzo, C.P. 141, 96017 Noto (SR), Italy;(7) Shanghai Astronomical Observatory, 80 Nandan Road, Shanghai, 200030, China;(8) Hartebeesthoek Radio Astronomy Observatory, P.O. Box 443, Krugersdorp, 1740, South Africa;(9) Dominion Radio Astrophysical Observatory, P.O. Box 248, Penticton, B.C., V2A 6K3, Canada;(10) Urumqi Astronomical Observatory, 40-5 South Beijing Road, Urumqi, Xinjiang, 830011, China |
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| Abstract: | VLBI observations of several quasars and BL Lacertae objects were carried out at 1.66 GHz in November–December 1999 using six antennas (Medvezh'i Ozera, Svetloe, Pushchino, Noto, HartRAO, and Shanghai). Maps of six sources (0420+022, 0420-014, 1308+326, 1345+125, 1803+784, and DA 193) obtained with milliarcsecond resolution are presented and discussed, together with their broad-band (1–22 GHz) spectra obtained on the RATAN-600 radio telescope at epochs close to those of the VLBI observations. Comparison of the VLBI maps with maps of these sources obtained on standard VLBI networks and with the RATAN-600 quasisimultaneous total-flux measurements indicates the reliability of the results obtained on this Low Frequency VLBI Network and the good efficiency of this network. |
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