In this work, we present 8523 pairs of R-band optical photometry observations for the quasar 3C 454.3 made during the period of 2006 October–2018 February on the 70 cm meniscus telescope at Abastumani Observatory, Georgia, to study its intraday variabilities (IDVs) and long-term variations, and we have come to the following results. (1) We detected 10 outbursts, a ΔR = 3.825 mag variation, and some IDVs. The IDV timescales are from 4.1 to 285 minutes, with the corresponding variability amplitude being A = 2.9%–43.67%. The amplitude increases with IDV timescale. (2) The largest variation over a 1 day timescale is ΔR = 1.38 mag. (3) The IDV timescales suggest that the emission sizes are from 8.9 10¹³ cm to 6.20 10¹⁵ cm, and the magnetic field strengths are B = 0.18–0.79 G. (4) Period analysis results show three possible long-term periods, p = 3.04 0.02 yr, p = 1.66 0.06 yr, and p = 1.20 0.03 yr in the optical light curve. We adopted the accretion disk models and the lighthouse models to period p = 3.04 0.02 yr: in the accretion disk models, the binary black holes have masses M = 1.17 10⁹ M _⊙; in the lighthouse models, we used two boosted jet flux densities to fit the observational light curve. (5) WWZ analysis gives some short-period (high-frequency) signals associated with strong bursts (JD 2,454,302 and JD 2,454,521) with variable frequencies and lasting for the entire observation time span (11.3 yr).

在这项工作中，我们展示了2006年10月至2018年2月在佐治亚州阿巴斯图玛尼天文台的70厘米弯月形望远镜上进行的类星体3C 454.3的8523对R波段光学测光观测，以研究其日内变化（IDV）和长期变化，我们得出了以下结果。（1）我们检测到10次爆发，ΔR = 3.825磁变，并发现了一些IDV。IDV时标为4.1到285分钟，相应的变异幅度为A = 2.9％–43.67％。幅度随IDV时标而增加。（2）在1天的时间范围内，最大变化是ΔR = 1.38 mag。（3）IDV时间尺度表明排放量为8.9 10 ¹³cm至6.20 10 ¹⁵ cm，磁场强度为B = 0.18–0.79G。（4）周期分析结果显示三个可能的长期周期，p = 3.04 0.02 yr，p = 1.66 0.06 yr，p = 1.20在光学光线曲线中为0.03年。我们通过吸积盘模型和灯塔模型周期p = 3.04 0.02年：在吸积盘模型中，双黑洞有群众中号= 1.17 10 ⁹ 中号 _⊙; 在灯塔模型中，我们使用了两个增强的射流通量密度来拟合观测光曲线。（5）WWZ分析给出了一些短周期（高频）信号，这些信号与可变频率的强脉冲（JD 2,454,302和JD 2,454,521）相关，并且在整个观察时间跨度（11.3年）内持续存在。