GCN Circular 10156
D. Malesani (DARK/NBI), A. de Ugarte Postigo (INAF/OABr), A. J. Levan (Univ. Warwick), N. R. Tanvir (Univ. Leicester), J. Hjorth (DARK/NBI), P. D'Avanzo (INAF/Brera), report on behalf of a larger collaboration: Following the observations of GRB 091109B (Oates et al., GCN 10148) with the VLT reported by Levan et al. (GCN 10154), we obtained a further epoch of R-band imaging with mean time Nov 10.33 UT (10.22 hr after the burst), using the same instrument and configuration. Source "A" by Levan et al. (GCN 10154) is still detected, and decayed by 1.0+-0.3 mag during this time interval, implying a decay index of alpha = 1.7+-0.5. We hence conclude that the source is indeed the afterglow of GRB 091109B. We acknowledge excellent support from the ESO staff at Paranal, in particular Alain Smette and Paul Lynam.