Tian Li, Jianghua Wu, Nankun Meng, Yan Dai, Xiaoyuan Zhang
Published 2021-08-10Version 1
We monitored BL Lacertae in the B, V, R and I bands for 14 nights during the period of 2016-2018. The source showed significant intraday variability on 12 nights. We performed colour-magnitude analysis and found that the source exhibited bluer-when-brighter chromatism. This bluer-when-brighter behavior is at least partly caused by the larger variation amplitude at shorter wavelength. The variations at different wavelengths are well correlated and show no inter-band time lag.
Effelsberg Monitoring of a Sample of RadioAstron Blazars: Analysis of Intra-Day Variability
Time Lag in Sgr A* Intra-Day Variability between the light curves at 90 and 102 GHz
Intraday Optical Variability of BL Lacertae
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