TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5542 SUBJECT: GRB060906 , optical observation DATE: 06/09/07 13:38:21 GMT FROM: Adalberto Piccioni at Astronomy, Bologna U. F. Terra (Second University of Roma "Tor Vergata"), G. Greco, C. Bartolini, A. Guarnieri, A. Piccioni (Bologna University), D. Nanni (INAF/OAR and Second University of Rome "Tor Vergata"), I. Bruni (Bologna Observatory), F. Strafella(University of Lecce and INFN, Lecce) and G. Pizzichini (INAF/IASF Bologna) report: Using the 152 cm Loiano telescope equipped with the BFOSC camera system, in poor sky conditions (full moon, seeing = 1.8"), we obtained one Rc-band image (1 x 900 sec) of the field of GRB060906 (Racusin et al., GCN 5540), starting on September 6.962 . At a 3-sigma level the OT reported by Cenko et al. (GCN 5529) is not detected in our frame, which is slightly deeper than Rc=20.3. We used NOMAD1 as our reference catalog.