TITLE: GCN GRB OBSERVATION REPORT NUMBER: 274 SUBJECT: GRB990308 not a new SGR DATE: 99/03/10 17:48:16 GMT FROM: David Palmer at USRA/GSFC David Palmer, on behalf of the Konus team, writes: More complete data from Konus suggests that the spikes in GRB light curves on 990307 and 990308 reported in GCN #271 are instrumental in origin. In addition, the pulses were absent in data from other spacecraft, including Ulysses (K. Hurley, priv. comm.), RXTE (F. Marshall, priv. comm.) and BATSE (Woods et al. GCN 273). We therefore retract our suggestion that these observations are of a new Soft Gamma Repeater. David Palmer palmer@lheamail.gsfc.nasa.gov USA (301) 286-2739 Voice USA (301) 286-1684 Fax