Low radio-flux state NuSTAR 1 X-ray spectrum (black filled squares in all panels) is compared with all other high radio-flux NuSTAR spectra (red empty circles in all panels) in the most sensitive NuSTAR band (3–30 keV). Each spectrum is the result of co-adding the FPM A and B NuSTAR detectors, as this improves visual clarity. The co-added spectra are produced by combining source and background spectra, as well as responses using the addspec FTOOL available within the HEASOFT package. Solid lines are plotted only to guide the eye, and they step through all data points (no spectral fit is included here).