Panel a: Flux densities at 225 GHz and 230 GHz from Table 2 versus the full width at half power of the corresponding synthesized beam. The 230 GHz flux (empty point) has been scaled to 225 GHz (solid point) assuming S_ν ∝ ν². The straight line is the linear fit (in the logarithmic plot) to the solid points, based on Eq. (3). Panel b: Flux densities from Table 2 as a function of frequency before (empty points) and after (solid points) scaling the fluxes to an angular resolution of 3.^′′ 37 (see text) with Eq. (3). The straight line is the linear fit (in the logarithmic plot) to the solid points, based on Eq. (4).