GCN Circular 20472
Subject
GRB 170112A : AbAO optical observations
Date
2017-01-16T19:35:42Z (8 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Pozanenko (IKI), R. Inasaridze (AbAO), A. Volnova
(IKI), V. Ayvazian (AbAO), O.Kvaratskhelia (AbAO), G. Inasaridze
(AbAO), I. Molotov (KIAM), report on behalf of larger GRB follow-up
collaboration:
We observed the field of short GRB 170112A (Mingo et al., GCN 20436)
with AS-32 (0.7m) telescope of Abastumani Observatory on Jan., 12 (UT)
15:35:30. We obtained several unfiltered images of the field. Within BAT
error circle (Mingo et al., GCN 2043) we found the source which is
absent in USNO-B1.0 at coordinates (J2000) 01:00:49.80 -17:10:17.5 with
uncertainty of 0.9 arcsec in both coordinates.
Finding chart can be found at
http://grb.rssi.ru/GRB170112A/GRB170112A_AAO_170112.png
The source is barely visible in DSS2 (R). Preliminary photometry of
the source is following
Date UT start t-T0 Filter Exp. OT Err UpLim (3 sigma)
(mid, days) (s)
2017-01-12 15:35:30 0.61446 CR 47*60 17.50 0.25 17.7
Photometry is based on nearby USNO-B1.0 stars
USNO-B.1_id R2
0727-0016063 14.46
0728-0016765 15.73
0728-0016759 12.78
0728-0016802 14.33
The source above does not match any source of XRT observation (D'Ai et
al., GCN 20440), see also http://www.swift.ac.uk/ToO_GRBs/00732188/