GCN Circular 6127
A. Melandri (Liverpool JMU) on behalf of the Liverpool GRB group report The 2-m Liverpool Telescope robotically followed up GRB070223 (Vetere et al., GCN 6125, trigger=261664) beginning ~18 minutes after the GRB trigger time (UT:01:15:00). We detect a very faint object inside the XRT position (Vetere et al., GCN 6125) not present in the USNO B1 catalog at this position RA = 10:13:48.73 Dec = +43:08:00.54 with an uncertainty of 0.5 arcsec. In a coadded frames (with a total integration time of 780 sec) the object has a magnitude R~23 +/- 0.3 (with respect the USNO B1) between 18 and 51 minutes after the burst. At the moment it is not possible to state if the object is fading. Further analysis and observations are ongoing.