Fig. 1.
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Optical i′-band (top panel) and X-ray light curves (bottom panel) of the 2019 outburst, monitored, respectively, by LCO and NICER. Blue arrows point to MJD 58726.0093, when our X-shooter spectra were acquired. The dashed line indicates the peak of the X-ray outburst, while the dotted line indicates the beginning of the X-ray reflaring state. Figure adapted from Baglio et al. (2020).
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