TITLE: GCN CIRCULAR NUMBER: 793 SUBJECT: GRB000911: Optical observations DATE: 00/09/12 21:22:02 GMT FROM: Paul Price at RSAA, ANU at CIT P. Price, T. Axelrod and B. Schmidt (Research School of Astronomy and Astrophysics, Australian National University) report: "We have imaged the error box of GRB000911 (Hurley et. al., GCN #791) with the MSO 50-inch telescope + MACHO camera. Our 4 x 300s exposures, starting at September 12.73 UT (approximately 1.4 days after the burst) cover the entire error box. The 3-sigma limiting magnitude of the combined red image is R ~ 20.7 mags (based on the USNO-A2.0 catalogue). We do not detect any optical afterglow candidate on comparison with the DPOSS (Djorgovski et. al., 1999)." Djorgovski, S. G., Gal, R. R., Odewahn, S. C., DeCarvalho, R. R., Brunner, R., Longo, G. & Scaramella, R. 1999, in Wide Field Surveys in Cosmology, S. Colombi et. al., eds., p. 89 This message may be cited.