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Fig. 3.
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IXPE, NuSTAR (200 s time bins for both), and NICER (50 s time bins) light curves of GX 9+1 (count s−1). The second and fourth panels show the IXPE and NuSTAR hardness-ratios: 5–8 keV/3–5 keV and 10–20 keV/6–10 keV, respectively. Empty gray circles indicate data points that are not simultaneous with the IXPE exposure.
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