TITLE: GCN GRB OBSERVATION REPORT NUMBER: 404 SUBJECT: BeppoSAX MAIL n. 99/24: GRB ALERT: GRB990907 DATE: 99/09/07 22:31:37 GMT FROM: Luigi Piro at IAS/CNR Frascati Giangiacomo Gandolfi, on behalf of BeppoSAX Mission Scientist, reports: A GRB (GB990907) was detected by the GRBM and WFC of BeppoSAX on Sep.7, around 17:34 U.T. Preliminary coordinates from WFC are: R.A.(2000)=112.552 DEC(2000)=-69.394 Due a less-than-optimal attitude configuration the error radius is about 8'.