TITLE: GCN GRB OBSERVATION REPORT NUMBER: 430 SUBJECT: GRB ALERT: GRB991105 DATE: 99/11/05 19:56:27 GMT FROM: Luigi Piro at IAS/CNR Frascati Luigi Piro, BeppoSAX Mission Scientist, on behalf of the SAX team reports: On Nov.5, 16:40:44 UT a GRB (GRB991105) was detected simultaneously by the GRBM and WFC of BeppoSAX (also BATSE trigger #7841). Preliminary coordinates from WFC are: R.A.(2000)= 180.80 DEC(2000)= -66.76 with an error radius of about 5'.