Calculated theoretical continuum spectra of both slim-disk (solid lines) and NT (dashed lines) models. The two panels show spectra calculated using either blackbody emission plus a constant hardening factor f = 1.6 or using BHSPEC emission. Mass accretion rates for both models are slightly different from each other and they are chosen is such a way that both NT and SD spectra have the same integrated (observed) luminosity L = 0.1,0.3,0.6 L_Edd. The observer is fixed at inclination 66°, the BH mass is 10 M_⊙ and the distance is 48 kpc.