TITLE: GCN GRB OBSERVATION REPORT NUMBER: 432 SUBJECT: GRB991105: SAX-GRBM/-WFC detection DATE: 99/11/05 21:55:09 GMT FROM: M.Smith. at SRON M.J.S. Smith, J.in't Zand, Space Research Organization of the Netherlands (SRON), Utrecht, G. Tarei, M. Dadina, BeppoSAX Scientific Operation Center (SOC), Rome, and L. Piro, Istituto di Astrofisica Spaziale/CNR, Rome report: "The BeppoSAX Gamma Ray Burst Monitor (GRBM) and Wide Field Camera (WFC unit 2) observed a gamma-ray burst triggered on November 5.6950 UT (BATSE trigger 7701). A preliminary analysis reveals a duration of 13 s in the GRBM, with a peak intensity of 970 cts/s in the 40-700 keV energy band. In the WFC, the duration is 40 s and the peak flux is 1.1 Crab (2-28 keV). The position of the X-ray counterpart is R.A. = 12h 03m 01s, Decl. = -66d 48' 49" (equinox 2000.0) with an 99% error radius of 3.6'. A BeppoSAX NFI follow-up observation will not be performed due to sun-angle constraints."