TITLE: GCN GRB OBSERVATION REPORT NUMBER: 451 SUBJECT: GRB 991208: Radio Observations DATE: 99/12/11 02:42:10 GMT FROM: Dale A. Frail at NRAO D. A. Frail (NRAO) reports on behalf of a larger collaboration: "Beginning 1999 December 10.92 UT we imaged the IPN error box (Hurley et al. GCN #450) of GRB 991208 with the Very Large Array (VLA) at 4.86 GHz and 8.46 GHz. Near the center of the IPN box, at R.A.=16 33 53.50, dec.=+46 27 20.9 (J2000), there is a previously uncataloged source. The source is unresolved at a resolution of 0.8 arcsec and has a spectral index of +1.4. Based on the source location, its inverted spectrum and compactness we consider this to be a strong candidate for the afterglow from GRB 991208. This GRB is located in the daytime sky, making optical observations all but impossible at this time. We urge further radio observations to determine whether the source is variable." This message is citeable.