GCN Circular 8576
Subject
GRB081128: optical observations
Date
2008-11-29T05:28:34Z (15 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
M. Andreev, A. Sergeev, (Terskol Branch of Institute of Astronomy), A.
Pozanenko (IKI) on behalf of larger GRB follow up collaboration report:
We observed the field of GRB 081128 detected by SWIFT (Margutti et al,
GCN 8571) with the Z-600 telescope of Mt. Terskol observatory. A set of
90 s unfiltered exposures was taken starting (UT) Nov. 28 17:37. In a
combined image of first exposures (3x90 s) we do not detect any new
object in the enhanced XRT (Evans, et al, GCN 8573) up to 18.5m. In a
combined image 18x90 s at mid time (UT) Nov. 28 18:08 we detect a faint
object at coordinates (J2000) RA, Dec = 01 23 13.02 +38 07 38.1 with
brightness of ~20.3m. A photometry and astrometry is preliminary and based
on USNO-A2.0 and R mag of USNO-A2.0. Our photometry at ~ 50 min after
burst is consistent with the photometry reported early (Wang et al, GCN
8572, Lin et al, GCN 8575) suggesting non fading source within XRT error
box.