TITLE: GCN GRB OBSERVATION REPORT NUMBER: 808 SUBJECT: GRB 000926 HST/Chandra TOO Status DATE: 00/09/28 20:41:06 GMT FROM: Shri Kulkarni at Caltech Dear Colleagues: This note is to inform you that, under the aegis of our AO-9 program, we have requested observations of GRB 000926 (GCN 801) with the Hubble Space Telescope and Chandra X-ray Observatory. This burst with a bright optical (GC 803, 804) and radio (GCN 805) afterglow appears to be particularly well suited for detailed studies of the afterglow and the circumburst medium. We encourage intensive ground based observations of this burst so that it will become a very well studied GRB. Particularly valuable are intensive lightcurves at early times since the earliest HST observation is at least a week away (as is the requested Chandra observation). We ourselves are planning to supplement the HST and CXO observations with detailed multiwavelength observations at facilities to which our group has access (e.g. Keck, Palomar, MDM, HET). In the radio, we will be undertaking observations at VLA and OVRO and possibly other facilities as well. Shri Kulkarni, on behalf of a large international GRB collaboration.