GCN Circular 10154

A.J. Levan (Warwick), N.R. Tanvir (Leicester),  J. Hjorth, D. Malesani (DARK/NBI),
A. de Ugarte Postigo, P. D'Avanzo (INAF-OAB) report on behalf of a larger collaboration:

We observed the location of the short GRB 091109B (Oates et al. GCNC 10148), with
the VLT/FORS2. Observations began at 03:34 UT, approximately 5.7 hours after the burst.
Within the X-ray localisation (Evans et al. GCNC 10151)  we identify a faint source 
(Source A) at:

RA: 07:30:56.61
Dec: -54:05:22.85

We also identify a second, fainter source (Source B) just outside the X-ray localisation, 
at:

RA: 07:30:56.46
Dec: -54:05:25.56

Both positions have errors of ~0.5" in each axis.

Source A has R~25, and appears pointlike. At this stage we cannot make any claim of 
variability in either source A or B, although further observation are planned.

Additionally, we note that the apparently extended object to the NW is actually a blend
of two stars, and a possible galaxy, rather than a single object, and hence its relation
to GRB 091109B is currently unclear.

We thank P. Lyman and the staff of VLT for their assistance with these observations.