GCN Circular 8503
Subject
GRB 081109A optical upper limit
Event
Date
2008-11-09T14:15:04Z (18 years ago)
From
AAVSO GRB Network at AAVSO <matthewt@aavso.org>
Peter Nelson (Ellinbank, Victoria, Australia) reports to the AAVSO
International High Energy Network the following optical observation of
GRB081109A (GCN #8500 Immler et al.; GCN #8501 D'Avanzo et al.):
Peter Nelson has obtained a limiting magnitude on the optical afterglow of
GRB081109A (Immler et al., GCN #8500). The near IR afterglow position RA:
22:03:09.72 Dec: -54:42:39.5 found by D'Avanzo et al. (GCN #8501) was observed
for 120 seconds using a 0.32-meter Newtonian with an SBIG ST8XE
CCD and an R filter under poor photometric conditions. The mid-point of
the observations was 2008 Nov 09.5188 UT, approximately 5.4 hours after the
burst. The afterglow was not detected to an upper limit of R=18.1, using
the USNO-A2.0 star 0300-37476396 (R=13.2) as the comparison.
A detailed report of these observations is available on the AAVSO website
at ftp://ftp.aavso.org/grb/PeterNelson_081109_2454780.06997_.txt
A fits image is available at
ftp://ftp.aavso.org/grb/PeterNelson_081109_2454780.06997_.fits
The AAVSO thanks the Curry Foundation for their continued support of the
AAVSO International High Energy Network.