GCN Circular 8630
Subject
GRB 081128: optical observation in CrAO
Event
Date
2008-12-06T15:33:01Z (17 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev, D. Shakhovkoy, S. Sergeev (CrAO), M.Andreev (Terskol Branch
of Institute of Astronomy), A. Pozanenko (IKI) on behalf of larger GRB
follow up collaboration report:
We observed the error box of Swift GRB 081128 (Margutti et al, GCN 8571) in
R band on Nov. 28 between (UT) 17:53:23 - 19:05:55 with AZT-11 telescope of
CrAO. Inside the refined XRT error box (Evans et al. GCN 8573) we detect the
source reported as possible afterglow (Wang et al, GCN 8572; Lin et al, GCN
8575; Andreev et al, GCN 8576; Guidorzi et al, GCN 8577). The coordinates
of the source are RA(J2000): 01 23 13.03 Dec(J2000): +38 07 37.7 with
uncertainty of 0.5". A photometry based on USNO-B1.0 star 1281-0027628
(01:23:11.75 +38:07:43.6) R2=17.91 is following:
T0+ Filter, Exp., mag. UL
(h) (s) (3 sigma)
1.207 R 23x180 21.5 +/-0.2 22.4
Taking above photometry and photometry reported earlier (Lin et al, GCN
8575; Andreev et al, GCN 8576; Guidorzi et al, GCN 8577) we confirm the
fading nature of the source. We also detected the source (Guidorzi et al,
GCN 8577) which is ~4" South of OT.
A combined image can be found at
http://grb.rssi.ru/GRB081128/GRB081128_AZT11_R_18_31_09.gif