GCN Circular 6538
John French (University College Dublin), Petr Kubanek (GACE Valencia), Gary Melady (University College Dublin), Martin Jelinek IAA CSIC Granada) report on behalf of the Watcher collaboration: The Watcher 40cm robotic telescope, located at Boyden Observatory, South Africa, began imaging the field of INTEGRAL GRB 070615 (Mereghetti et al., GCN 6537) at 02:22:08 UT, 1m22s after the IBAS trigger. Initial observations were performed at high airmass and show no new source down to an R-band limiting magnitude of approximately 15 (in comparison with USNO-B1). Observations and analysis are ongoing. This message may be cited.