TITLE: GCN CIRCULAR NUMBER: 6047 SUBJECT: GRB 070125: optical observations DATE: 07/01/28 13:03:03 GMT FROM: Giuseppe Greco at U Bologna G. Greco (Bologna University), F. Terra (Second University of Roma "Tor Vergata"), C. Bartolini, A. Guarnieri, A. Piccioni (Bologna University), G. Pizzichini (INAF/IASF Bologna), D. Nanni (INAF/OAR and Second University of Rome "Tor Vergata"), R. Gualandi (Bologna Observatory) and V. F. Polcaro (INAF/IASF Roma) report: On January 27-28 we observed the field of GRB 070125 (Hurley et al., GCN 6024) with the 152 cm Cassini Telescope located in Loiano, equipped with BFOSC under clear sky conditions (seeing approximately 2 arcsec). The photometry is based on the SDSS stars and the trasformation derived from Lupton (2005). For the optical afterglow detected by Cenko and Fox (GCN 6028) we find the following magnitudes: ..Mean..UT .......Filter........Exptime (s).......magnitude Jan...27.950........Rc............1200............20.23 +/-0.10 Jan...27.966........Rc............1200............20.26 +/-0.11 Jan...27.983........Rc............1200............20.21 +/-0.11 Jan...28.087........Rc............1200............20.25 +/-0.11 Jan...28.102........Rc............1200............20.35 +/-0.12 One of our images is available in a public directory from where it can be retrieved by sftp by using: hostname: ermione.bo.astro.it username: publicGRB password: GRB_bo directory: GRB070125