TITLE:   GCN CIRCULAR
NUMBER:  7022
SUBJECT: GRB071031: Rapid PROMPT Detections
DATE:    07/10/31 03:12:18 GMT
FROM:    Josh Haislip at U.North Carolina  <haislip@physics.unc.edu>

J. Haislip, K. Ivarsen, D. Reichart, M. Nysewander, A. LaCluyze, J. A.
Crain, A. Foster, M. Schubel, J. Styblova, T. Brennan, and A. Trotter
report:

Skynet observed the localization of GRB 071031 (Stroh et al., GCN 7020)
with three of the 16" PROMPT telescopes at CTIO beginning 78 seconds after
the burst (24 seconds after notification) in UBVR.

We detect the afterglow (Stroh et al., GCN 7020).  At 8.2 minutes after
the burst, we measure R ~ 18.2 mag calibrated to four USNO B1.0 stars.