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Fig. 11.
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Zoomed-in view from Fig. 10 of the MAXI J1820+070 spectra for 2018 covering hydrogen Hβ, HeII 4686 Å, and the broad 4640 Å blend attributed to NIII lines. The spectra are offset by the indicated quantity for clarity of the plot. The typical velocity separation of 850 km s−1 for the double-peaked profiles is marked.
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