GCN Circular 11668
Subject
GRB 110206A: SMARTS optical/IR afterglow candidate observations
Event
Date
2011-02-07T23:35:22Z (15 years ago)
From
Bethany Cobb at GWU <bcobb@gwu.edu>
B. E. Cobb (GWU) reports:
Using the ANDICAM instrument on the 1.3m telescope at CTIO, we obtained
optical/IR imaging of the error region of GRB 110206A (GCN 11654,
Mereghetti et al.) with a mid-exposure time of 6.8 hours post-burst
(2011-02-07 00:57:41 UT). Total summed exposure times amounted to
36 minutes in I and 30 minutes in J.
The source which is the possible optical afterglow of GRB 110206A
(GCN 11662, Hoversten et al. and GCN 11665, Elliott et al.) is detected
in our optical image. Preliminary comparison to Landolt standards stars in
I and 2MASS stars in J indicates the following I-band magnitude and J-band
3-sigma upper limit for this source:
time post-burst I mag J 3-sigma limit
6.8 hours 20.6+/-0.1 >18.8
Our data do not allow for a test of variability at this time, so we
cannot confirm that this source is the optical afterglow of GRB 110206A.