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Fig. 3.
ASCA SIS spectra taken in 1993 (black crosses, lower spectrum), 1996 (blue crosses, middle spectrum) and 2000 (black crosses, upper spectrum, for display purposes scaled by a factor of two), together with the best-fit models as shown by the red lines. See Sect. 3.2 for an explanation of the deviations at long wavelengths.
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