TITLE: GCN CIRCULAR NUMBER: 10255 SUBJECT: GRB 091208B: BOOTES-3 optical afterglow DATE: 09/12/08 10:11:30 GMT FROM: Antonio Deugarte at IAA-CSIC A. de Ugarte Postigo (INAF-OAB), A.J. Castro-Tirado, J. Gorosabel, M. Jelinek (IAA-CSIC), P. Kubanek (IPL UV, IAA-CSIC), R. Cunniffe, S. Guziy (IAA-CSIC), P. Yock (Auckland Univ.), W.H. Allen (Vintage Lane Obs.), I. Bond (Massey Univ.), G. Christie (Stardome Obs.), report on behalf of a larger collaboration, report: "We have observed the field of GRB091208B (Swift trigger 378559) using the 0.6m Yock-Allen robotic telescope (BOOTES-3) located in Bleinheim, New Zealand. Observations began at 09:50:04 UT (45 sec after the burst). There is a bright optical counterpart within the XRT error circle at coordinates (J2000.0 +/- 1"): R.A.: 01:57:34.13 Dec.: +16:53:23.00 Further observations are ongoing." [GCN OPS NOTE(11oct09): Per author's request, the time was changed from "05:50:04" to "09:50:04". Please note that the OPS NOTE was first set up in 11oct09, but it took me until 29oct2021 to actually change the time in the body of the text. Thanks to Alex Kann to notice that the change needed to be completed.]