Fig. 1
U-band light curve of the AGN nucleus between June 2016 and October 2017 after subtraction of the host galaxy contribution. The inset shows the entire U-band light curve since 2000 for comparison as presented in (McElroy et al. 2016). The gray area in the inset highlights the coverage of the zoom-in axes. The substantial sunblock period in 2017, where it is unobservable, is indicated by the black hatched area. The date of our joint Chandra and HST observation is shown as the green dashed line.
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