GCN Circular 10122

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
Not found
 
 
) 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
Not found
 
 
) 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.]