Synchronous observations of the intraday variability of active galactic nucleuses in optical and radio ranges

The combined radio and optical observations of the active galactic nuclei were performed in the period from 2004 to 2006 years. The aim of our analysis was the detection of intraday variability and the search of possible correlation in radio and optical wavelenghts. The observations were conducted in CrAO (RT-22) at frequencies 22.2 and 36.8 GHz, and on the 1-m Zeiss-1000 reflector of the Special Astrophysical Observatory (SAO RAS). The instrument is equipped with CCD camera. The observations were performed in the R band. From 2004 to 2006 we performed five observing cycles, each by 7-10 nights, of the extragalactic nuclei 0133+476, 1633+382, 2134+004, 2145+067, 2251+158. In DA 55 and 2134+004 we detected the short time flux variations (0.2^m on the scale of about 15 min) in R band. We find no significant fluctuations of the flux of the other sources. The significant radio flux variations were detected for 0133+476, 2134+004 (about 1.5 Jy on the scale 15 min), for 2145+067 (about 3 Jy on the scale 2 hours), for 2251+158 (about 2-2.5 Jy on the scale 0.5 hours). We did not detect any significant correlations of the optical and radio fluxes.