TITLE: GCN CIRCULAR NUMBER: 17023 SUBJECT: GRB 141022A: Skynet PROMPT-CTIO Observations DATE: 14/11/03 13:24:59 GMT FROM: Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet A. Trotter, J. Haislip, D. Reichart, A. Aji, R. Beauchemin, T. Berger, A. Dow, A. Foster, N. Frank, M. Hinckle, K. Ivarsen, A. LaCluyze, M. Maples, J. Moore, M. Nysewander, C. Salemi, L. Zbinden, and J. A. Crain report: Skynet observed the Swift BAT/XRT localization of GRB 141022A (Vargas et al., GCN 16938, Swift trigger=616061) with one 24" telescope (PROMPT 8; I band) and two 16" telescopes (PROMPT 1,5; V,I bands) of the PROMPT array at CTIO, Chile. Starting at 2014-10-22 01:29:40 UT and continuing until 02:50 UT (t=2m-83m post-trigger), Skynet took a total of 126 exposures ranging from 10s-160s each. We stacked subsets of these images to maximize the S/N ratio, and detected no optical source in either band at the OT position reported by GROND (Kann et al., GCN 16939). Our 3-sigma limiting magnitudes are: ================================== tmid scope expos fil limit ================================== 50m PROMPT1 25x160s V >21.2 50m PROMPT5 24x160s I >20.6 45m PROMPT8 46x80s I >20.3 ================================== Magnitudes are in the Vega System, calibrated to 3 APASS stars in the field. Magnitudes have not been corrected for line-of-sight Milky Way dust extinction, with expected E(B-V)=0.09 (Schlafly & Finkbeiner 2011). No further Skynet observations are scheduled.