GCN Circular 15792
Subject
GRB 140206A: ISON-Ussuriysk optical observations
Date
2014-02-06T15:54:46Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), A. Stepura (UAFO, ISON), A. Matkin (UAFO, ISON), I.
Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB
follow-up collaboration:
We observed the afterglow (Oksanen et al., GCN 15786; Oate et al., GCN
15787) of the Swift and INTEGRAL GRB 140206A (Lien et al., GCN 15784;
Gotz et al., GCN 15785) with VT-50 (0.5m) telescope of
UAFO/ISON-Ussuriysk observatory starting on Feb. 6 (UT) 09:20:05, i.e.
~2 hours after burst trigger. We took unfiltered images of 30s
exposures. In stacked frames we clearly detect afterglow. A
preliminary photometry of the afterglow is following:
T_start T0+ Filter, Exposure, OT, OT_err
(UT) (mid, d) (s)
2014-02-06T09:20:39 0.08783 none 9*30 17.76 0.24
2014-02-06T10:52:26 0.15309 none 19*30 18.06 0.08
The photometry is based on reference stars SDSS-DR9, (R mag,
transformation by Lupton 2005)
N SDSS_id R(Lupton)errR
1 J094123.75+664429.9 15.441+/-0.013
2 J094126.54+664410.8 13.837+/-0.014
3 J094131.29+664857.0 13.972+/-0.011
Observations continuing.
The finding chart can be found in
http://grb.rssi.ru/GRB140206A/grb140206A_VT50_fc.png
