THE BROAD-BAND SPECTRAL ENERGY-DISTRIBUTIONS OF THE CLOVERLEAF QUASARAND IRAS F10214+4724

We have constructed broadband spectral energy distributions for the Cl overleaf quasar (z = 2.56) and the luminous infrared galaxy IRAS F1021 4+4724 (z = 2.28). These are to date the only two high-redshift object s known with measured thermal far-infrared spectra and the only two wi th solid millimeter-wave detections of molecular gas. The continuum da ta are assembled from the literature, from a new analysis of IRAS meas urements, and from new measurements in the near-infrared, optical, and at 1.25 mm. The spectral shapes and luminosities of the two objects a re nearly identical from the rest submillimeter to 20 mu m, but they d iverge dramatically in the optical/ultraviolet. A simple unifying obsc uration/reflection model is presented that may explain the differences . Considering their very similar molecular gas content, together with evidence based on the continuum energy distributions and optical spect ropolarimetry, it appears quite plausible that the Cloverleaf and F102 14+4724 in fact differ for the most part only in their orientations wi th respect to Earth.