Example of the 2 Teff fitting procedures for the class III source IW Tau. The extinction-corrected Asiago spectrum is shown in black, and contemporaneous photometry is shown as filled orange squares. The best-fit spectrum is shown in purple, and the corresponding T_hot = 4100 K and the T_cool = 3200 K BTSettl models are reported in blue and red, respectively. Top: broadband fitting. Bottom: spectral fitting. Flux units are 10⁻¹³ ergs⁻¹ cm⁻² nm⁻¹. Fits to the complete subsample of heavily spotted sources are reported in Appendices B.2 and B.1.