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
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.