TITLE: GCN CIRCULAR NUMBER: 10122 SUBJECT: GRB 091102: BOOTES-3 observations DATE: 09/11/02 23:26:42 GMT FROM: Antonio Deugarte at IAA-CSIC A. de Ugarte Postigo (INAF-OAB), M. Jelinek, A.J. Castro-Tirado (IAA-CSIC), P. Kubanek (IPL UV, IAA-CSIC), J. Gorosabel, 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: "We have observed the field of GRB 091102 (Hoversten et al. GCN 10117) with the 0.6m Yock-Allen robotic telescope (BOOTES-3) in Bleinheim, New Zealand. The observations were obtained with clear filter and began at 14:35:04 UT (26 seconds after the burst). As stated by Schaefer et al. (GCN 10119) using ROTSE-III data, there is no obvious counterpart within the BAT error box. Inspection of the XRT error circle shows a source at the South-Western edge that is present both in the DSS and in 2MASS. Combining early images we detect a further low signal source, with coordinates (J2000) 04:50:27.22, -72:31:10.3. We note however, that this is a preliminary reduction and that the detection cannot be secure at this point. In the following address we provide a finding chart indicating the location of the source: http://www.iaa.es/~mates/091102_BOOTES3.jpg t-t0(s) Exp(s) Mag =============================== 72 39x2 19.07+/-0.35 406 107x2 19.36+/-0.35 530 60x5 > 19.96 83 19x30 > 19.25 2708 47x60 > 20.30 =============================== For the photometry we have used the star located at the coordinates (J2000) 04 50 26.58, -72 31 35.3, assuming a magnitude of 16.14." [GCN OPS NOTE(02nov09): The Subject-line was changed from 091103 to 091102.]