X-ray spectra of η Carinae. The black dots correspond to the spectra of the third and seventh NuSTAR observations and the red and green dots correspond to the BAT and INTEGRAL averaged spectra, respectively. The NuSTAR best-fit models are plotted as brown dashed lines. The dotted and dot-dashed lines correspond to the best-fit power law models to the Suzaku and INTEGRAL observations, respectively.