TITLE: GCN CIRCULAR NUMBER: 10154 SUBJECT: GRB 091109B: VLT observations DATE: 09/11/10 05:33:34 GMT FROM: Andrew Levan at U.of Leicester 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.