A. Trotter, J. Haislip, D. Reichart, A. Verveer, T. Spuck, 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 141212A (Ukwatta
et al., GCN 17158, Swift trigger=621229) with the 14" R-COP telescope at
Perth Observatory, Australia. Starting at 2014-12-12 12:24 UT and
continuing until 14:13 UT (t=10.2m-119m post-trigger), Skynet took a
total of 24x160s exposures in the B, V, R, and I bands. We stacked
subsets of these images to maximize the S/N ratio, and detected no
optical source in any band at the XRT position. Our 3-sigma limiting
tmid expos fil limit
87m 7x160s B >19.9
106m 8x160s V >20.5
41m 3x160s R >20.0
30m 2x80s I >18.5
Limiting magnitudes are in the Vega System, calibrated to 6 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 &
No further Skynet observations are scheduled.