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Fig. 1.
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X-ray light curves (with 50 s bins) and HRs of 4U 0115 + 63 during the 2023 outburst from Obs. 1 (upper panel) and Obs. 2 (lower panel). The HR is 6−20 keV versus 3−6 keV. The insert shows the details of the light curve. Different colors represent the different phases used for spectral analysis in Sect. 3.4.
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