THE OPTICAL VARIABILITY OF THE SEYFERT-GALAXIES NGC-4051 AND NGC-1068

The optical (BV) monitoring data for the Seyfert galaxies NGC 4051 and NGC 1068 are presented in this paper. NGC 4051 showed a variation of 0.43 mag in 21 minutes in B band from its bright nucleus, and the nucl eus of NGC 1068 exhibited a variability of 0.46 mag in B band in a tim escale of 1.8 hours. These results argued that the optical emission fr om the nuclei of the two Seyfert galaxies could be dominated by the no nthermal radiation. The data in this paper, however, are only marginal evidence on the rapid optical variability of these two Seyferts, and further monitoring is needed to confirm this type of variability.