TITLE:   GCN CIRCULAR
NUMBER:  9970
SUBJECT: GRB 090929B: Skynet/DSO Observations
DATE:    09/09/29 20:28:10 GMT
FROM:    Josh Haislip at U.North Carolina  <haislip@physics.unc.edu>

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 090929B (Pagani et al., 
GCN 9963) with the 14" Dark Sky Observatory telescope in North Carolina 
beginning 12.0 minutes after the trigger in I.

We do not detect the afterglow (Pagani et al., GCN 9963, Wren et al., GCN 
9967) within the enhanced Swift/XRT localization (Goad et al., 9964; Page, 
GCN 9965).  However, the nearby I = 9.07 mag (USNO B1) star complicates 
photometry.

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)

12.0    DSO-14   1 x 80    I      17.1     183 USNO B1   0.400    0.001