Example of the result of the χ-squared fitting procedure for SkKM 113. The black line shows the observed data, and the red line the best-fitting model with an effective temperature of 25kK and logg = 4.0. The red star marks the synthetic photometry in the UVIT F172M band, which was computed directly from the HST spectrum. The green star marks the UVIT F172M magnitude from Thilker et al. (in prep.). The difference in magnitude between the two is ∼0.3mag.