Continuum peak flux (in a 0.5′′ beam toward IRAS 16293B for the 18 different spectral setups (plus signs) as a function of frequency. A slight increase in flux as a function of frequency is seen that can be approximated by a power-law F_ν ∝ ν². The shaded areas correspond to this dependency ± 5% (darker color) and ± 10% (lighter color). About 70% of the measurements are within the ± 5% region with all of the measurements within the ± 10% area.