Abstract

A total of 693 UBVRI photoelectric observations for 91 active galaxies are reported. These observations were secured as part of a one-year monitoring program. Objects are classified in three classes according to their degree of variability; 52 percent of the galaxies did not show a significant variability (class 1); 12 percent showed some variations (class 2); and 35 percent displayed significant variations (class 3). A comparison with four other sets of photometric values is carried out.