A 250 GHz survey of high-redshift quasars from the Sloan Digital Sky Survey

We present observations at 250 GHz (1.2 mm), 43 GHz, and 1.4 GHz of a sampl e of 41 QSOs at z > 3.7 found in the Sloan Digital Sky Survey. We detect 16 sources with a 250 GHz flux density greater than 1.4 mJy. The combination of centimeter and millimeter wavelength observations indicates that the 250 GHz emission is most likely thermal dust emission. Assuming a dust tempera ture of 50 K, the implied dust masses for the 16 detected sources are in th e range 1.5-5.9 x 10(8) M-circle dot, and the dust emitting regions are lik ely to be larger than 1 kpc in extent. The radio-through-optical spectral e nergy distributions for these sources are within the broad range defined by lower redshift, lower optical luminosity QSOs. We consider possible dust h eating mechanisms, including UV emission from the active galactic nucleus ( AGN) and a starburst concurrent with the AGN, with implied star formation r ates between 500 and 2000 M-circle dot yr(-1).