Fig. 1.
Swift XRT (0.3–2.0 keV) light curve of Mrk 110, showing the portions closest to the times of five of the XMM-Newton observations. The XMM-Newton start times are marked with vertical dotted lines, with four occurring in November 2019 (a − d respectively) and one in April 2020 at the start of the 2020 Swift monitoring period. Mrk 110 shows factor of two soft X-ray variability. Time is plotted from the beginning of the 2019–20 Swift monitoring, which commenced on February 20, 2019.
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