GCN Circular 5845
Subject
GRB 061121: ART detection in Ic
Date
2006-11-23T05:22:27Z (17 years ago)
From
Ken ichi Torii at Osaka U <torii@ess.sci.osaka-u.ac.jp>
K. Torii (Osaka U.) reports on behalf of the ART collaboration:
The error region of the bright GRB 061121 (Page et al. GCN
5823) was observed with the 14 inch ART-3a in Toyonaka. The
imaging started at about 5 minutes after the trigger while
the useful frames were obtained after 17:15 UT (t=113
minutes) when the object rose to 20 degrees above the horizon.
The optical afterglow (GCN 5823) is detected at 3.2 sigma
in a stacked frame. Comparison with the USNO-B1.0 I2 mag
gave the following measurement.
-----------------------------------------
StartUT Filter Mag Exposure
=========================================
17:15:24 Ic 18.1 60s x 100
=========================================