Microvariability of the blazar OJ 287?

Abstract. Results of BV RI CCD photometric monitor-ing and fast photometry in the I band for the blazar OJ 287 in 1994-1995 are presented. The predicted outburst of the blazar had been observed, the maximum appeared in 1994 November, after that, the luminosity decreased by 1.6 mag for about three months and dropped to near the level in 1994 April. Rapid variations with timescales of minutes, hours and one day were observed in our obser-vations, with small amplitude. The amplitude of the most rapid variations (minutes) is in the range of 0:m043−0:m12. The results of the statistical analysis of the fast photome-try data are as follows. In ve nights out of six rapid vari-ability appeared in the sampling interval, which ranged from 3.4 minutes to 6.5 minutes, with a rms amplitude of flux variations of 1:70% − 2:3%. The rapid variability can be explained by the model of shocks within turbulent jet or of vortices and magnetic flux tubes on accretion disk