Illustrative plots showing the dust SED for various dust temperature and dust masses enclosed in an area equivalent to the central beam of our Band 9 observations. The black datapoints show the measured fluxes in the central beam (see Table D.1). Right: Optically thin versus optically-thick SED for various dust masses. Center and left: Optically thick dust SED for varying dust temperatures and dust masses. Under optically-thick conditions, higher dust masses do not translate to higher fluxes at higher frequencies, making Band 8-10 observations sensitive probes of the dust temperature.