GCN Circular 15218
Subject
GRB 130912A: Skynet DSO-14/Yerkes-41/PROMPT-CTIO observations
Date
2013-09-12T17:07:49Z (11 years ago)
From
Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet <atrotter@physics.unc.edu>
A. Trotter, D. Reichart, J. Haislip, A. LaCluyze, A. B. Smith, D. Caton,
L. Hawkins, V. Hoette, K. Cudworth, D. Harper, R. Kron, T. Linder, R.
Russell, E. Struble, T. Berger, H. T. Cromartie, R. Egger, A. Foster, N.
Frank, K. Ivarsen, M. Maples, J. Moore, M. Nysewander, and J. A. Crain
report:
Skynet observed the Swift/XRT localization of GRB 130912A (D'Elia et
al., GCN 15212, Swift trigger 570465) with the 14" telescope at the
Appalachian State University Dark Sky Observatory (DSO-14) in NC, USA (R
and I bands), the 41" telescope of Yerkes Observatory in WI, USA (r' and
i' bands), and with four 16" telescopes of the PROMPT array at CTIO,
Chile (B, V, R, and I bands).
Starting at 2013-09-12, 08:47 UT and continuing until 10:26 UT
(t=12m-111m post-trigger), Skynet took a total of 72 160s exposures. In
stacked images, we do not detect an optical source in any band in or
near the XRT error circle. Our 3-sigma limiting magnitudes are
tabulated below:
==================================
tmid scope expos fil limit
==================================
21m DSO-14 2x160s I >18.7
24m DSO-14 2x160s R >19.6
61m Prompt5 10x160s I >20.6
61m Prompt4 10x160s R >21.0
61m Prompt1 10x160s V >21.3
61m Prompt3 10x160s B >21.1
63m Y-41 11x160s i' >21.6
60m Y-41 9x160s r' >21.9
66m Y-41 8x160s g' >21.8
==================================
BVRI magnitudes are in the Vega System, and g'r'i' magnitudes are in the
AB system, calibrated to 4 APASS stars in the field. Magnitudes have
not been corrected for line-of-sight Milky Way dust extinction, with
expected E(B-V)=0.28 (Schlegel et al. 1998).
No further Skynet observations are scheduled.