GCN Circular 19986
Subject
GRB 161004A: SAO RAS optical upper limit
Date
2016-10-04T23:02:45Z (8 years ago)
From
Moskvitin Alexander at SAO RAS <mosk@sao.ru>
A. Moskvitin (SAO RAS), A. Volnova (IKI), and A. Pozanenko (IKI)
report on behalf of the larger GRB follow-up team.
We observed the field of GRB 161004A (Evans et al., GCN 19979)
with Zeiss-1000 - the 1-meter telescope of Special Astrophysical
Observatory of Russian Academy of Sciences. We obtain several
images with filter Rc starting on October, 4 (UT) 15:44:35.
In the refined XRT error circle (Beardmore et al., GCN 19983)
we do not detect the optical counterpart (Breeveld and Evans,
GCN 19984). Preliminary photometry of a combined image is following
Date UT start t-T0 Filter Exp. OT UL
(mid, days) (s)
2016-10-04 15:44:35 0.1396 Rc 12*300 n/d 22.4
Photometry is based on nearby SDSS-DR9 stars reported
by Mazaeva et al. (GCN 19980).