| 摘 要： | We report results of our optical photometric observations of ten gammaray loud blazers, namely: 0219 428 (3C66A), PKS 0420-014 (OA 129), S5 0716 714,0754 100 (OI 090.4), 0827 243 (OJ248), 1652 398 (Mrk 501), 2200 420 (BL Lacertae), 2230 114 (CTA 102), 2251 158 (3C 454.3) and 2344 514. The observations were carried out in September-October, 2000 using the 70 cm optical telescope at Abstumani Observatory, Georgia. We found intra-day variations in 0420-014,S5 0716 714, BL Lacertae and CTA 102. A variation of 0.3 magnitude over a timescale of about 3 hours was observed in the R passband in BL Lacertae on JD 2451827.We did not detect any variation in 3C 66A, Mrk 501, or 3C 454.3 during our observations. Nor did we detect any clear evidence of variation in 1ES 2344 514 during our two weeks‘ observing run of the TeV gamma-ray source.
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