BIMA OBSERVATIONS OF GAMMA-RAY BURSTERS GRB-970111 AND GRB-970228

The Satellite per Astronomia X (BeppoSAX) is successfully producing sm all error boxes to gamma-ray bursts, permitting rapid follow-up multiw avelength searches for fading and quiescent counterparts. For GRB 9702 28 this led to the discovery of the first convincing fading counterpar t. However, no counterpart was found for GRB 970111. In this Letter, w e present our observations approximately 1 week after GRB 970228 and 1 month after GRB 970111 using the Berkeley-Illinois-Maryland Associati on (BIMA) array at 3.5 mm. No fading millimeter-wave sources were dete cted, but we demonstrate that BIMA is well suited for performing futur e searches.