[vsnet-grb-info 5810] GRB080319B: Prompt PROMPT Detections

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7461
SUBJECT: GRB080319B: Prompt PROMPT Detections
DATE:    08/03/19 20:21:30 GMT
FROM:    Mark Schubel at UNC/PROMPT  <mschubel at physics.unc.edu>

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

Skynet observed the localization of GRB 080319B (Racusin et al., GCN 7427) 
with three of the 16" PROMPT telescopes at CTIO beginning 32 seconds after 
the trigger (15 seconds after notification) in UVRI.

We detect the afterglow (Racusin et al., GCN 7428) in all filters.  At 92 
seconds after the burst we measure V ~ 8.6 mag (calibrated to 3 NOMAD 
stars), and at 147 seconds we measure I ~ 8.9 mag (calibrated to 6 USNO B1 
stars).