Fig. 8.

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X-ray count flux spectrum from STIX observations, at 15:27:59 UT with an integration over 0.5 s. The observed count flux is shown by the thick black crosses, the pre-flare background spectrum is shown by the thin black line, and the fitted spectrum is shown by the green line. The thermal component of the fitted model is shown in red, and the non-thermal power-law component is shown in blue.
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