TITLE: GCN GRB OBSERVATION REPORT NUMBER: 364 SUBJECT: GRB990704: possible X-ray afterglow DATE: 99/07/05 13:13:06 GMT FROM: Luigi Piro at IAS/CNR Frascati Giangiacomo Gandolfi on behalf of BeppoSAX Mission Scientist reports: A BeppoSAX follow-up of GRB990704 started about 8 hr after the burst. Preliminary analysis of the first three orbits of the MECS data at SOC shows a previously unknown source inside the WFC error circle. Preliminary coordinates are: RA(2000)= 184.872 DEC(2000)= -3.840 The error radius is 1.7'. BeppoSAX is continuing its observation. [GCN OPS NOTE: This message was received 08:16 UT 05 Jul 99.]