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GCN Circular 9924

GRB 090807: Skynet/DSO Observations
2009-09-18T06:01:13Z (15 years ago)
Josh Haislip at U.North Carolina <>
J. Haislip, D. Reichart, A. Smith, D. Caton, L. Hawkins, K. Ivarsen, M. 
Schubel, 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 090807 (Cannizzo et al., 
GCN 9746) with the 14" Dark Sky Observatory telescope in North Carolina 
beginning 10.4 hours after the trigger in I.

We do not detect the afterglow (Cannizzo et al., GCN 9746).  Stacking only 
images that increase the limiting magnitude yields:

mean                                                      1-sig.   1-sig.
time                               3-sig.                 sys.     stat.
since                              lim.     cal.          cal.     cal.
trig.   tel.     exp.       fil.   mag.     stars         unc.     unc.
(h)              (# x s)                                  (mag)    (mag)

10.7    DSO-14   10 x 160   I      18.9     807 USNO B1   0.489    0.000
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