DOUBLE-PEAK STRUCTURE IN THE CYCLIC OPTICAL OUTBURSTS OF BLAZAR OJ-287

An international monitoring project, called OJ-94, was set up with the aim of monitoring blazar OJ 287 during the predicted optical outburst (in fall 1994, Sillanpaa et al. 1988) and the predicted secondary out burst (in winter 1995-1996, Sillanpaa et al. 1996a). The most prominen t features in the OJ 287 light curve during the period covered by the project are the large outburst in September-December 1994, reaching th e maximum at the beginning of November, and the secondary outburst pea king just at Christmas 1995. Both these outbursts occurred almost exac tly at the predicted times.