Image Details
Caption: Figure 4.
4.5–78.4 keV NuSTAR FPMA (black) and NuSTAR FPMB (red) spectra and the 0.7–10 keV Swift (blue) spectrum of 4U 1728-34, fit with the continuum model: disk blackbody + blackbody + power law. The residuals between 6–8 keV indicate the presence of iron emission.
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