The temperature is typical for dust in Galactic clouds and cirrus. Such a large dust mass is hard to reconcile with 3C460 being an elliptical galaxy. Starbursts and active galaxies do not show very cold dust emission at millimeter wavelengths. 3C334 is probably a variable millimeter source. Assuming , a 1.2 mm flux of 15mJy would be expected, much higher than our upper limit of 3mJy.
Brackets indicate an off-centerdetection.
3C59 is excluded, because its redshift has not yet been determined. Although we find that the infrared luminosities are comparable between the classes, there is evidence that the quasars are brighter at 1.2 mm than the radio galaxies. At 178MHz the quasars are only marginally brighter. The sample is too small to draw firm conclusions, but it appears that the stronger millimeter emission from quasars may be due to a beamed component. When comparing the integrated flux at 178MHz and 1.4 GHz, the quasars are a factor 1.5 brighter than the radio galaxies.