Spectra of model fitting components identified at 1.68, 15.35, 43.12, and 86.25 GHz: (from left to right) C, C1, C2, and J3. Flux densities are shown with black, circle points with uncertainty (see Table 2), and the blue, solid-line shows the fitting result assuming a SSA spectrum (see Sect. 3.1.3). Fitting errors, due to the flux density uncertainties, are presented with the blue, shaded area. The derived SSA turnover frequencies in C, C1, and C2 are shown with the yellow, shaded area.