Fig. 9.
Pulse profiles of 4U 1901+03 from four NuSTAR observations in black (NuObs1), red (NuObs2), green (NuObs3), and blue (NuObs4) in the 3–79 keV energy band. The purple pulse profile was obtained from Insight-HXMT P021106008 in the energy band 1–30 keV. Black dashed lines show the phase segments we used to extract the phase-resolved spectra.
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