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Fig. 2


Left: pulse profiles obtained from the merged EPIC data in different energy bands (P = 8.035331 s). All the profiles are background-subtracted and normalized to the average count rate (0.276, 0.454, 0.438, 0.311, 1.48 cts s-1, from top to bottom). Right: hardness ratios as a function of pulse phase derived from the pulse profiles in two neighbouring standard energy bands.

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