RADIO COUNTERPARTS OF UNIDENTIFIED EGRET GAMMA-RAY SOURCES

We present one new radio identification and one confirmation of two hi gh-latitude gamma-ray sources detected by CGRO-EGRET, based on flux de nsity measurements at 1.3 mm (Caltech Submillimeter Observatory(2)) an d 1.3 cm (Metsahovi Research Station) of objects in the EGRET error bo xes. We identify EGRET sources J0744+5438 and J1239+0441 with 87GB 073 840.5+545138 and 87GB 123701.3+045944, respectively, both 5-GHz radio sources from the GB6 catalog (Gregory & Condon 1991, APJS, 75, 1011). The broad-band energy distributions of these two objects suggest that they have steeper spectra below the turnover frequency than is the cas e for most blazars in the Second EGRET Catalog. In addition, they tend to have lower radio luminosities relative to their gamma-ray luminosi ties than most of the EGRET blazars. J1239+0441 has no previous identi fication with a source in another waveband, while our identification o f J0744+5438 is consistent with that of Mukherjee et al. (1995, ApJ, 4 45, 189). We also report 1.3-mm flux densities of five other gamma-ray blazars. (C) 1997 American Astronamical Society.