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Fig. 3
Top: overall, average persistent emission spectrum as seen by JEM-X (5–25 keV) and IBIS/ISGRI (25–200 keV). The spectrum has been fitted with a cut-off power law with photon index of 1.5 and a high energy cut-off at 57 keV (see text). Bottom: Residuals from the above fit in units of χ.
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