The fluxes of CO obtained using the residual fitting method are shown in Figures and for FiberForm and vitreous carbon respectively. The TD-prompt flux of CO reaches a maximum at 1400 K and then decreases for vitreous carbon, while it plateaus at 1723 K for FiberForm. The fluxes of TD-slow1 and TD-slow2 become vanishingly small at temperatures greater than 1700 K for vitreous carbon, but these signals persist in FiberForm. However, the TD-slow1 flux of FiberForm reaches a maximum at 1400 K and then decreases as the surface temperature increases.