GCN Circular 10109

Subject

GRB 090920: Skynet/DSO Detection

Event

Date

2009-10-29T21:38:15Z (16 years ago)

From

Aaron LaCluyze at U.North Carolina <lacluyze@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 10048Loading...
 
 ) 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 10048Loading...
 
 ).  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.