Fits to the joint ROSAT, Chandra zero-order, and NuSTAR spectra of BZ Cam. All three spectra are fit simultaneously with the model, tabs × zxipcf ×GABS×GABS×GABS(-BREMSS+power+GAUSS+GAUSS+GAUSS) on the left. The middle panel shows the same fitted joint spectra without the inclusion of the power-law model (notice the excess beyond 10 keV). The right-hand panel shows the same spectra using the composite model tbabs × zxipcf ×GABS×GABS×GABS(VNEI+power+GAUSS+GAUSS). The dotted lines show the contribution of different model components, where the residuals in standard deviations (in sigmas) are displayed in the lower panels.