Search for intra-day optical variability in Mrk 501

Hai-Cheng Feng, H. T. Liu, X. L. Fan +5

We present our observations of the optical intra-day variability (IDV) in $\gamma$-ray BL Lac object Mrk 501. The observations were run with the 1.02 m and 2.4 m optical telescopes at Y…