Nightly-binned light curve above 200 GeV measured with the H.E.S.S. telescopes in November 2018 (black data points). Integrated upper limits (gray arrows) are given at a 95% confidence level. The red solid line shows the exponential fit to the measured flux points excluding upper limits, while the pink dashed line shows a constant fit to those flux points, and the blue solid line is the constant fit to those points except the first night.