TITLE: GCN CIRCULAR NUMBER: 8181 SUBJECT: GRB 080905: R & I-band optical observations DATE: 08/09/05 16:47:34 GMT FROM: Javier Gorosabel at IAA-CSIC P. Tristram (MOA, Univ. of Canterbury), A.J. Castro-Tirado (IAA-CSIC, Granada), P. Yock (Univ. of Auckland), J. Gorosabel (IAA-CSIC, Granada), A. de Ugarte Postigo (ESO, Santiago), report on behalf of a larger collaboration: "Following the detection by Swift of GRB 080905 (Pagani et al. GCNC 8180), we have obtained R & I-band images at the 0.6m telescope of the Mt. John Observatory, New Zealand. The images were taken starting on Sep 5.529 UT (i.e. 43 min post-burst). We do not detect any object brighter than R=20.8 and I=20.3 consistent with the XRT position. We note the presence of two extended R~15 (R~15.4) objects 8.5" (10") South (North-East) (Object A at RA(J2000)=19:10:41.51, DEC(J2000)=-18:52:56.2 and Object B at RA(J2000)=19:10:41.10, DEC(J2000)=-18:52:40.6, respectively) from the XRT position which could be hosting the probably-short GRB 080905. A finding chart can be found at http://www.sc.eso.org/~adeugart/GRB/080905/080905fc.jpg"