TITLE: GCN CIRCULAR NUMBER: 8402 SUBJECT: GRB 081024: Faulkes Telescope North optical observations DATE: 08/10/24 10:56:02 GMT FROM: Andrea Melandri at Liverpool John Moores U A. Melandri, M. Burgdorf, R.J. Smith, I.A. Steele, D.F. Bersier, C.G. Mundell, (Liverpool JMU), A. Gomboc (Ljubljana), C. Guidorzi (INAF-OAB) on behalf of a larger collaboration report: On 2008 October 24 at 05:54:45 UT (~50 seconds after the GRB trigger) we observed the field of GRB 081024 (trigger = 332516, Stratta et al., GCN 8938) with the robotic 2m Faulkes Telescope North located in Hawaii. Observations were performed on BVRi filters. We do not detect any fadind optical source within the XRT error circle (Stratta et al., GCN 8938) down to the following limits: -------------------------------------------------- Dt_mid T_exp Filter Mag_lim [min] [sec] -------------------------------------------------- 2.25 30 R > 21.4 112.8 600 R > 22.6 136.2 600 I > 21.2 -------------------------------------------------- Limiting magnitudes has been estimated using the R2 and I magnitudes of the USNOB-1 catalogue. The reported values are not corrected for the Galactic extinction.