GCN Circular 3232
Subject
GRB 050408: Optical limit
Event
Date
2005-04-11T06:39:05Z (21 years ago)
From
Ken ichi Torii at RIKEN <torii@crab.riken.go.jp>
K. Torii (Osaka U.) reports
"The error region of GRB 050408 (Sakamoto, et al. GCN 3189) was
observed by the ART 14-inch telescope. BVRcIc imaging started at 2005
April 8, 16:23:48 UT (57-s after trigger) and 60-s exposure in each
filter was repeated.
The optical afterglow (de Ugarte Postigo, et al. GCN 3192) is not
detected in our frames and the following 3-sigma upper limits are
derived relative to USNO-A2.0 (R).
MeanEpoch(UT) Magnitude Exposure
16:24:18 >16.2Rc 60s
16:28:50 >16.2Rc 60s
16:33:22 >17.0Rc 60sx5
"