GCN Circular 18890
Subject
GRB 160104A: ISON-Ussuriysk optical observations
Date
2016-01-18T21:20:20Z (8 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), E. Chornaya (UAFO), A. Matkin (UAFO, ISON), A.
Volnova (IKI), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of
larger GRB follow-up collaboration:
We observed the field of the GRB 160104A (Melandri et al., GCN 18815)
with SANTEL-650 (0.65m) telescope of UAFO/ISON-Ussuriysk observatory
starting on 2016-01-04 (UT) 12:21:43. We obtained 60 unfiltered images
of 60 s exposure. We clearly detect optical afterglow (Guidorzi et al.,
GCN 18816) and preliminary photometry of a combined image is following
Date UT start t-T0 Filter Exp. OT OT_err U_limit (3sigma)
(mid, days) (s)
2016-01-04 12:21:43 0.0635 none 59*60 20.45 0.12 22.3
The photometry is based on nearby USNO-B1.0 stars:
USNO-B1.0_id R2
1013-0049708 15.14
1013-0049721 14.90
1013-0049703 16.30
1013-0049714 17.12
We also note the presence of a source 11" South-East of m = 20.60 +/-
0.15.