Image Details
Caption: Figure 3.
Spectral fits of RB–MXB 221021 with the PL and CPL models. The top panel shows the best-fit PL and CPL spectra, together with the νFν data points unfolded using the PL model. The last two panels present the residuals of the PL and CPL fits to the folded spectral data.
© 2026. The Author(s). Published by the American Astronomical Society.