Spectral energy distribution of CB 26-YSO 1, adopted from Zhang et al. (2021), where we also list the fluxes in Table 1. Red squares and green dots with error bars show the observational data. The dashed black line shows best-fit model SED of Zhang et al. (2021). The dashed-dotted blue line represents the adopted contribution from free-free emission. The dotted red line corresponds to the sum flux of dust and free-free emission between 2.9 mm and 4.0 cm. The break in the SED at ~10³ µm is due to the transition from total flux measurements at shorter wavelengths to interferometric data at longer wavelengths, which do not recover the total flux from the extended envelope emission.