[vsnet-grb-info 8380] GRB 090814A: Skynet/DSO & GORT Observations
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Wed Sep 9 09:42:05 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 9903
SUBJECT: GRB 090814A: Skynet/DSO & GORT Observations
DATE: 09/09/09 00:41:59 GMT
FROM: Josh Haislip at U.North Carolina <haislip at physics.unc.edu>
J. Haislip, D. Reichart, K. Ivarsen, A. Smith, D. Caton, L. Hawkins, L.
Cominsky, K. McLin, T. Graves, G. Spear, A. LaCluyze, 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 090814A (Ukwatta et al.,
GCN 9793) with the 14" Dark Sky Observatory telescope in North Carolina
beginning 71.1 minutes after the trigger in RI through variable cloud
cover.
Skynet continued observing with the 14" GORT telescope at Hume Observatory
in California beginning 3.3 hours after the the trigger in RI.
We do not detect the afterglow (Updike et al., GCN 9794). Stacking only
images that increase the limiting magnitude yields:
mean
time 3-sigma secondary
since limiting calibration
trigger telescope exposures filter magnitude stars *
75.4 m DSO-14 2 x 160 s I 18.5 13 SDSS 6
+ 1 x 80 s
86.4 m DSO-14 4 x 160 s R 19.2 9 SDSS 6
96.6 m DSO-14 3 x 160 s I 17.8 13 SDSS 6
105.3 m DSO-14 1 x 160 s R 16.9 9 SDSS 6
4.7 h GORT 35 x 80 s I 20.1 8 SDSS 6
5.2 h GORT 40 x 80 s R 20.8 7 SDSS 6
24.9 h DSO-14 11 x 160 s R 20.0 9 SDSS 6
* Transformed using Jester et al., 2005, ApJ, 130, 873.
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