TITLE: GCN CIRCULAR NUMBER: 8108 SUBJECT: GLAST Burst Monitor detection of GRB 080817 DATE: 08/08/20 12:53:00 GMT FROM: Elisabetta Bissaldi at MPE Elisabetta Bissaldi (MPE), Michael Briggs (UAH), Andreas von Kienlin and Sheila McBreen (MPE) report on behalf of the GLAST Burst Monitor Team: "At 03:52:10 UT on 2008 Aug 17, the GLAST Burst Monitor (GBM) triggered and located GRB 080817 (GBM 080817.161 / trigger 240637931). The on-ground calculated location, using the GBM trigger data, is RA = 151.29, Dec = -19.26 (J2000 degrees) (equivalent to J2000 10h 05m, -19d 15' ), with an uncertainty of 1 degree (radius, 1-sigma containment, statistical only; there is additionally a systematic error which is currently estimated to be 2 to 3 degrees). The angle from the Large Area Telescope (LAT) boresight is 80 degrees. This GRB has a duration of approximately ~70 s and contains 2 main peaks in the interval between 0 and 25 s and a weaker peak around 50 s. Spectral analysis is in progress."