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Fig. 3

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Calibration spectrum for observation no. 44 (ID 0893811301). The spectrum is accumulated in the circular dashed regions, enclosing giant molecular clouds, shown in Fig. 2. We performed a fit in the 5.0–7.2 and in the 7.6–8.5 keV range. The fit model is a power-law continuum with four Gaussian lines.
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