TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2804 SUBJECT: GRB 041006 R observations in Loiano DATE: 04/10/15 11:32:26 GMT FROM: Corrado Bartolini at Universita di Bologna G. Greco, C. Bartolini, A. Guarnieri, A. Piccioni (Universita' di Bologna) P. Ferrero (IASF/CNR, Bologna; Osservatorio e Universita' di Teramo), G. Pizzichini (IASF/CNR, Bologna), E. Mazzotti Epifani (INAF, Oss. di Capodimonte - Napoli) and R. Gualandi (INAF, Bologna Observatory) report: On October 7, 2004 in clear sky conditions (seeing 2") we obtained two R-band images (1200 sec X 2) of the OT of GRB 041006 (=HETE 3570) reported by Da Costa, Noel and Price (GCN 2765) with the 152 cm telescope in Loiano.We co-added the two exposures and used the following stars in Henden's photometric calibration (GCN 2801): RA Decl. 13.6373 1.221278 13.708797 1.202692 13.783485 1.302545 We find the following magnitude for the OT: R = 22.22 +/- 0.13 at UT 22:40 (mean value). Our images are available in a public directory from where it is possible to retrieve them by sftp using: hostname: ermione.bo.astro.it username: publicGRB password: GRB_bo directory: GRB041006