RADIO, MILLIMETER-SUBMILLIMETER, AND INFRARED-SPECTRA OF FLAT-SPECTRUM EXTRAGALACTIC RADIO-SOURCES

We present radio to submillimeter-wave continuum spectra of 44 bright, compact extragalactic radio sources with flat spectra at centimeter w avelengths (''blazars''). Infrared J, H, and K flux densities are adde d to the spectra of six of these objects. These spectra are useful in comparisons of x-ray and gamma-ray measurements with the multiwaveband properties of blazars. A number of the objects have been detected as strong, hard gamma-ray sources by the Compton Gamma Ray Observatory (C GRO). The millimeter-wave spectra of the gamma-ray bright blazars we o bserve are flatter on average than for the sample as a whole.