[vsnet-grb-info 8408] GRB 090726: Skynet/GORT Observations

GCN Circulars gcncirc at capella.gsfc.nasa.gov
Sun Sep 20 05:44:20 JST 2009


TITLE:   GCN CIRCULAR
NUMBER:  9926
SUBJECT: GRB 090726: Skynet/GORT Observations
DATE:    09/09/19 20:44:14 GMT
FROM:    Josh Haislip at U.North Carolina  <haislip at physics.unc.edu>

J. Haislip, D. Reichart, L. Cominsky, K. McLin, T. Graves, G. Spear, K. 
Ivarsen, A. LaCluyze, A. Foster, J. Moore, A. Oza, M. Schubel, J. Styblova, 
A. Trotter, J. A. Crain, and M. Nysewander report:

Skynet observed the Skynet/BAT localization of GRB 090726 (Page et al., GCN 
9706) with the 14" GORT telescope at Hume Observatory in California 
beginning 5.9 hours after the the trigger in I.

We do not detect the afterglow (Page et al., GCN 9707; Moskvitin, 
Fatkhullin & Valeev, GCN 9709).  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)

6.2     GORT   15 x 80   I      19.8     84 USNO B1    0.213    0.002
6.8     GORT   8 x 80    R      20.2     178 USNO B1   0.235    0.001


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