Multi-color optical monitoring of the quasar 3C 273 from 2005 to 2016

Dingrong Xiong, Jinming Bai, Haojing Zhang +4

We have monitored the quasar 3C 273 in optical $V$, $R$ and $I$ bands from 2005 to 2016. Intraday variability (IDV) is detected on seven nights. The variability amplitudes for most…