Fig. 2.
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Evolution of the pulse profiles during the outburst. Top: color-coded normalized pulse profiles as observed by NICER. Slices in the vertical direction correspond to pulse profiles in individual NICER observations, the shaded strips mark the times of IXPE observations, and the vertical dashed line is the same as in Fig. 1. Bottom: pulse profiles in the 2−8 keV band observed by IXPE in two observations (histogram) and NICER during the same period (dotted line, scaled to match the IXPE count rate).
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