GCN Circular 20011
Subject
GRB 161004A: refined analysis of TSHAO optical observations
Date
2016-10-07T23:58:37Z (8 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), I. Reva (Fesenkov Astrophysical Institute), A. Kusakin
(Fesenkov Astrophysical Institute), A. Volnova (IKI), A. Pozanenko
(IKI) report on behalf of larger GRB follow-up collaboration:
We present a refined analysis of our observations (Mazaeva et al., GCN
19980) of the field of GRB 161004A (Evans et al., GCN 19979) with
Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory.
We obtained several images in R filter starting on Oct. 04 (UT)
13:36:52. In a combined image of the first 30 minutes of our
observations we detect the afterglow (Breeveld et al., GCN 19984).
Preliminary photometry of a combined image is following
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2016-10-04 13:36:52 0.03632 R 9*180 21.65 0.25 21.7
Photometry is based on nearby SDSS-DR9 stars used in GCN 19980.