GCN Circular 9927
Subject
GRB 090715B: Skynet/PROMPT Detections
Date
2009-09-21T04:34:58Z (15 years ago)
From
Josh Haislip at U.North Carolina <haislip@physics.unc.edu>
J. Haislip, D. Reichart, 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 Swift/BAT localization of GRB 090715B (Vetere et al.,
GCN 9668) with three of the 16" PROMPT telescopes at CTIO beginning 3.1
hours after the trigger in UBRI.
We detect the afterglow (Vetere et al., GCN 9668). 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)
3.4 PROMPT-3 12 x 80 U > 17.5 (3 sig.) 10 SDSS 7 0.094 0.001
3.8 PROMPT-5 40 x 80 I 19.80 +0.40 -0.29 93 SDSS 7 0.268 0.000
3.8 PROMPT-4 41 x 80 R 20.31 +0.20 -0.17 78 SDSS 7 0.151 0.000
4.0 PROMPT-3 29 x 80 B > 20.8 (3 sig.) 37 SDSS 7 0.134 0.000
* Transformed using Jester et al., 2005, ApJ, 130, 873.