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Fig. 8.

image

Evolution of the iron lines from absorption to emission when GRS 1915+105 changed from the rebrightening phase (top seven spectra) to the obscured phase (bottom three spectra). Two spectra from the obscured phase (MJD 58622 and MJD 58623) are overlaid to highlight the possible absorption feature of Fe XXV Kα line. The best-fit models are shown as solid lines.

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