Fig. 1.
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Multi-wavelength light curves of MAXI J1957+032 during the 2025 outburst. Top: 0.5–10 keV unabsorbed flux measured with Swift/XRT (blue points) and the XMM-Newton/PN observation (pink point). Bottom: Optical g′, r′, and i′ magnitudes from LCO (see Sect. 2.4). An additional observation performed on May 13, 2025 (MJD 60808), corresponding to the blend of MAXI J1957+032 with a g′∼20 nearby star, is shown for comparison. Error bars represent 1σ uncertainties.
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