TITLE: GCN CIRCULAR NUMBER: 6115 SUBJECT: GRB 070220 : Faulkes Telescope North optical limit DATE: 07/02/20 06:15:07 GMT FROM: Andrea Melandri at Liverpool John Moores U A. Melandri (Liverpool JMU), A. Gomboc (Ljubljana), R. J. Smith, C. G. Mundell, C. Guidorzi, D. Carter, I. A. Steele, C. J. Mottram, D. F. Bersier, S. Kobayashi, M. F. Bode (Liverpool JMU), P. O'Brien, E. Rol, N. Bannister (Leicester) report The 2-m Faulkes Telescope North robotically followed up GRB070220 (Stamatikos et al., GCN 6114, trigger=261299) beginning ~2 minutes after the GRB trigger time (UT:04:44:33). No new object has been detected inside the XRT error circle (Stamatikos et al., GCN 6114) down to a limiting magnitude of R~19.5 for a coadded frame with a total exposure time of 420 sec, at a mean epoch of 28 min after the burst (comparison with respect to the USNO B1 catalog). Further observations are ongoing.