TITLE: GCN CIRCULAR NUMBER: 14158 SUBJECT: GRB 130131A - Faulkes Telescope North Observations DATE: 13/01/31 16:27:53 GMT FROM: Francisco Virgili at Liverpool John Moores U F.J. Virgili (LJMU), C. Guidorzi (U. Ferrara), and A. Melandri (INAF-OAB) report: "The 2-m Faulkes Telescope North robotically followed up GRB 130131A (Swift trigger 547407, Grupe et al. GCN 14156) 2.88 min after the GRB trigger time. No optical counterpart is detected within the XRT error circle to the following conservative limits: Midtime from GRB Exposure Filter Magnitude (min) (s) ------------------------------------------------- 3.4 3x10s R >19.2 28.9 720s R >20.6 33.7 700s i' >20.1 ------------------------------------------------- Magnitudes are calibrated with nearby USNOB-1 and SDSS stars."