GCN Circular 8367
Subject
GRB 081008 optical upper limit
Event
Date
2008-10-13T12:04:46Z (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
GRB081008 (GCN #8344 Racusin et al.; GCN #8343 Rykoff et al.):
Peter Nelson has obtained a limiting magnitude on the optical afterglow of
GRB081008 (Racusin et al., GCN #8344). The optical afterglow position RA:
18:39:50, Dec: -57:25:52 found by Rykoff et al. (GCN #8343) was observed
for a total of 480 seconds using a 0.32-meter Newtonian with an SBIG ST8XE
CCD and an R filter. The mid-point of the observations was 2008 Oct
09.4150 UT, approximately 14 hours after the burst. The afterglow was not
detected to an upper limit of R=18.2, using USNO-A2.0 star 0300-34687382
(R=11.8) as the comparison. This upper limit is consistent with the
R-band magnitude of R=18.46 on 2008 Oct 08.9951 observed by Cobb et al.
(GCN #8356).
A detailed report of these observations is available on the AAVSO website
at ftp://ftp.aavso.org/grb/PeterNelson_081008_2454752.03073_.txt
A fits image is available at
ftp://ftp.aavso.org/grb/PeterNelson_081008_2454752.03073_.fits
The AAVSO thanks the Curry Foundation for their continued support of the
AAVSO International High Energy Network.