X-ray spectra of M87 from Chandra and NuSTAR observations in April 2018. Colour-coding for the spatially resolved components is the same as in Fig. 7. The red curves represent the spatially resolved model appropriate for each dataset. The NuSTAR model is the sum of the other spatial components (with cross-normalisation constants to account for instrumental differences between NuSTAR and Chandra as well as between NuSTAR’s two focal plane modules).