4. The continuum spectra of the sources
which reflects the contribution from free-free emission and from two dust-continuum-emission components. The parameters of the spectral fit are given in Table 4 for in units of 100 GHz. The observations listed in Table 3 have been put into reasonable bins and are shown as filled dots. The uncertainty of the curves shown in the figure (especially in the short submm-range) can be estimated by comparing the flux densities at a given frequency observed with different resolutions. For both sources such data are available from the JCMT at 384 GHz and in the 860 GHz range, where the published peak flux densities at a given frequency vary by factors of 1.2-1.5 depending on the aperture. After applying the corrections to the peak flux data, the corrected flux densities plotted in Figs. 3 and 4 nearly merge and the differences become comparable or smaller than the internal observational errors. We think that this is a good indicator that the applied procedure works properly.
Table 3. List of measured flux densities
For a calibration check, it is necessary to get the flux of one of the sources for a given frequency and beam size. This is simply done by calculating the integrated flux of the source using the parameters given in Table 4 and then to scale down the calculated flux according to
Table 4. Fit parameters
© European Southern Observatory (ESO) 1998
Online publication: September 30, 1998