A. Trotter, D. Reichart, J. Haislip, A. LaCluyze, T. Berger, H. T.
Cromartie, R. Egger, A. Foster, N. Frank, K. Ivarsen, M. Maples, J.
Moore, M. Nysewander, E. Speckhard, and J. A. Crain report:
Skynet observed the Swift/XRT localization of GRB 130427A (Maselli et
al., GCN 14448, Swift trigger #554620) with four 16" telescopes of the
PROMPT array at CTIO, Chile, starting at 2013-04-27, 23:28 UT, and
continuing until 04-28, 05:30 UT (t=15.69h-21.67h post-trigger). It took
~124 160-s exposures, simultaneously in each of the BVRI bands. We
performed photometry on each exposure, calibrated to two SDSS stars in
the field. We detect a fading afterglow in BVRI at the position reported
by Elenin et al. (GCN 14450), which is ~50" south of the initial XRT
A preliminary light curve of the first night's data is at:
Further Skynet observations are ongoing.