Spectral density distribution of nine YSOs obtained using the YSO models of Robitaille et al. (2006). Filled circles are the flux values converted from magnitudes listed in Table 2. The thin black line represents the best fitting SED, and the gray lines show all models that also fit the data well (defined by , where χ² is the value per data point). The dashed line represents the stellar photosphere model (corrected for the foreground extinction). The derived masses are indicated; see Table 6 for other parameters.