Fits to the SEDs and IRS spectra of C stars. In the upper panel the model (the continuous line) is shown with the IRS spectrum and the photometric points on a logarithmic scale. The lower panel shows the IRS spectrum and model in more detail on a linear scale. The model has been fit to the data by scaling to a quasi-continuum point based on the average flux in the 6.4–6.5 μm region. Horizontal lines near the bottom indicate wavelength regions excluded from the fit.