TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5640 SUBJECT: GRB 060927 optical limit DATE: 06/09/27 23:03:03 GMT FROM: Graziella Pizzichini at IASF/CNR,Bologna G. Greco, C. Bartolini, A. Guarnieri, A. Piccioni (Bologna University), F. Terra, Second University of Roma "Tor Vergata", D. Nanni (INAF/OAR and Second University of Roma "Tor Vergata"), S. Galleti, R. Gualandi (INAF Bologna) and G. Pizzichini (INAF/IASF Bologna) report: Using the 152 cm Loiano telescope equipped with the BFOSC camera system, we obtained three 20 min. Rc-band images of the field of GRB060927 (Barbier et al., GCN 5627), starting at Sept. 27.763 , 27.779 and 27.795 respectively, seeing 2.2 arcsec. In our co-added images we do not detect the OT reported by Schaefer, Yost and Yuan (GCN 5629). Our 3 sigma upper limit is Rc = 21.7 .