TITLE: GCN CIRCULAR NUMBER: 14414 SUBJECT: GRB 130420B: Faulkes Telescope North observations DATE: 13/04/20 14:18:52 GMT FROM: Andrea Melandri at INAF-OAB A. Melandri (INAF-OAB), C. Guidorzi (U. Ferrara) and C. G. Mundell (Liverpool) report on behalf of a larger collaboration: The 2-m Faulkes Telescope North (FTN) automatically began observing GRB130420B (Oates et al., GCN 14411) on April 20, 12:59:50 UT corresponding to ~200 seconds after the burst event. We detect no new, uncatalogued source in the BAT error circle down to the following limiting magnitudes: Mid time from Exp Filter Mag limit trigger (min) (sec) --------------------------------------------------- 28.62 540 R > 20.5 32.75 520 I > 20.0 --------------------------------------------------- The magnitudes are calibrated against nearby USNO-B1.0 stars.