MAXI J1535 − 571 spectra using observational data from Russell et al. (2020) and this work. HIMS and SIMS data are represented in green and orange, respectively. The measured additional high-energy components are indicated with dotted lines. Their 90% uncertainties interval range is represented by the colored area. The purple dotted line is the extrapolation of the optically thin synchrotron spectrum from Russell et al. (2020) with α = 0.83 ± 0.09.