[vsnet-grb-info 8601] GRB 090920: Skynet/DSO Detection
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Fri Oct 30 06:38:31 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 10109
SUBJECT: GRB 090920: Skynet/DSO Detection
DATE: 09/10/29 21:38:15 GMT
FROM: Aaron LaCluyze at U.North Carolina <lacluyze at physics.unc.edu>
LaCluyze, A., D. Reichart, A. Smith, D. Caton, L. Hawkins, J. Haislip, K.
Ivarsen, R. Egger, A. Foster, J. Moore, A. Oza, M. Schubel, J. Styblova, A.
Trotter, J. A. Crain, and M. Nysewander report:
Skynet observed the Swift/BAT localization of GRB 090920 (Racusin et al.,
GCN 10048) with the 14" Dark Sky Observatory telescope in North Carolina
beginning 12.0 hours after the trigger in I.
We detect the afterglow (Racusin et al., GCN 10048). Stacking only images
that increase the limiting magnitude yields:
mean 1-sig. 1-sig.
time sys. stat.
since cal. cal. cal.
trig. tel. exp. fil. magnitude stars* unc. unc.
(h) (# x s) (mag) (mag)
12.6 DSO-14 18 x 160 I 19.75 +0.26 -0.21 13 SDSS 7 0.020 0.001
* Transformed using Jester et al., 2005, ApJ, 130, 873.
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