2.2 AND 1300 MU-M OBSERVATIONS OF A COMPLETE SAMPLE OF SOUTHERN QUASARS

We present 2.2 and 1300 mu m data of a complete sample of optically se lected southern quasars. All objects have 1300 mu m flux densities bel ow approximate to 20 mJy (3 sigma), except QSO 0448 - 392 which shows a faint signal of approximate to 40 mJy. These results clearly indicat e that previously claimed detections at Jy level must have been errone ous. The 2.2 mu m data allow the determination of the spectral turnove r at short wavelengths and define the spectral slope between IR and ra dio wavelengths. The sample can be divided into two categories of 7 ra dio-loud and 10 radio-quiet quasars. The radio-loud quasars have redsh ifts between z = 1.3 and 3.2 and their energy distributions do not dif fer significantly from nearby quasars; the emission from cm to mm wave lengths is due to synchrotron radiation. The analysis of the radio-qui et quasars does not show any conclusive evidence for thermal component s apart from QSO 0530 - 379 where the FIR emission is probably dominat ed by thermal radiation from dust.