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Radio Physics and Radio Astronomy

ISSN Imprimir: 2152-274X
ISSN En Línea: 2152-2758

Archives: Volume 1, 2010 to Volume 3, 2012

Radio Physics and Radio Astronomy

DOI: 10.1615/RadioPhysicsRadioAstronomy.v1.i2.40
pages 111-115


O. E. Volvach
"Crimean AstrophysicalObservatory" Research Institute
L. N. Volvach
"Crimean AstrophysicalObservatory" Research Institute
V. S. Bichkova
FIAN Astrospace Centre
M. S. Kardashev
FIAN Astrospace Centre
M. G. Larionov
FIAN Astrospace Centre
V. V. Vlasyuk
Special Astrophysical Observatory
O. I. Spiridonova
Special Astrophysical Observatory


Joint and synchronous radio and optical observations of active galactic nuclei aimed at detecting fast intraday flux density variabilities (IDV) and searching for their possible correlation are carried out. The radio sources 0133+476, 1633+382, 2134+004, 2145+067 and 2251+158 were observed with the CrAO RT-22 at 22.2 and 36.8 GHz and with the SAO RAS 1-m Zeiss-1000 reflector with a CCD camera in 2004-2006. The variations in the R-band are within 0.2m at time scale 15 min in 0133+476 and 0.25m at time scale 20 min in 2251+158. In the rest of sources no significant flux density variability was observed. In the radio band, the flux density variability of the sources 0133+476, 2134+004 is 1.5 Jy at time scale 15 min, and 3 Jy at time scale 2 h in 2145+067. The chaotic fluctuations of the flux density observed in 2251+158 are 2÷2.5 Jy at time scale 0.5 h. No correlation is observed between the variability in optical and radio wavelengths.


  1. Pearson, T. J. and Readhead, A. C. S., The milliarcsecond structure of a complete sample of radio sources. II - First-epoch maps at 5 GHz.

  2. Terasranta, H., Wiren , S., Koivisto, P., Saarinen, V. , and Hovatta, T., 24 year monitoring of extragalactic sources at 22 and 37 GHz.

  3. Robson, E. I., Stevens, J. A., and Jenness, T., Observations of flat-spectrum radio sources at λ850 μm from the James Clerk Maxwell Telescope-I.

  4. Mattox, J.R., Bertsch, D.L., Chiang, J., Dingus, B.L., Fichtel, C.E., Hartman, R.C., Hunter, S.D., Kanbach, G., Kniffen, D.A., Kwok, P.W., Lin, Y.C., Mayer-Hassel-wander, H.A., Michelson, P.F., von Montigny, C., Nolan, P. L., Pinkau, K., Schneid, E., The EGRET detection of quasar 1633+382.

  5. Moore, R. L. and Stockman, H. S., A comparison of the properties of highly polarized QSOs versus low-polarization QSOs.

  6. Landau, R., Golisch, B., Jones, T. J., Jones, T. W., Pedelty, J., Rudnick, L., Sitko, M. L., Kenney, J., Roellig, T., Salonen, E., Urpo, S., Schmidt, G., Neugebauer, G., Matthews, K., Elias, J. H., Impey, C., Clegg, P., and Harris, S., Active extragalactic sources - Nearly simultaneous observations from 20 centimeters to 1400 Å.

  7. Hanski, M. T., Takalo, L. O., Valtaojla, E., Correlated radio and optical variations in a sample of AGN.

  8. Tornikoski, M., Jussila, I., Johansson, P., Lainela, M., and Valtaoja, E., Radio Spectra and Variability of Gigahertz-Peaked Spectrum Radio Sources and Candidates.

  9. Marshall, H. L., Schwartz, D. A., Lovell, J. E. J., Murphy, D. W., Worrall, D. M., Birkinshaw, M., Gelbord, J. M., Perlman, E. S., and Jauncey, D. L., A Chandra Survey of Quasar Jets: First Results.

  10. Zavala, R. T. and Taylor, G. B., A View through Faraday’s Fog: Parsec-Scale Rotation Measures in Active Galactic Nuclei.

  11. Xie, G. Z., Li, K. H., Bai, J. M., Dai, B. Z., Liu, W. W., Zhang, X., Xing, S. Y., Search for Short Variability Times cale of the GeV Gamma-Ray−Loud Blazars.

  12. Villata, M., Raiteri, C. M., Ghisellini, G., Francesco, G. D., Bosio, S., Latini, G., Bucciarelli, B., Chiaberge, M., Chiumiento, G., Cora, A., Lanteri, L., Lattanzi, M. G., Massone, G., Peila, A., Racioppi, F., Smart, R. L., Scaltriti, F., Anderlucci, E., Optical photometric monitoring of γ-ray loud blazars. I. Observations from November 1994 to November 1995.