Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 15792

GRB 140206A: ISON-Ussuriysk optical observations
2014-02-06T15:54:46Z (10 years ago)
Alexei Pozanenko at IKI, Moscow <>
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
Looking for U.S. government information and services? Visit