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 13679

GRB 120811C: optical observations
2012-08-18T22:18:42Z (12 years ago)
Alexei Pozanenko at IKI, Moscow <>
L. Elenin (KIAM), A. Volnova (SAI MSU), I. Molotov (KIAM), A. Pozanenko 
(IKI) report on behalf of  larger GRB  follow-up collaboration:

We observed the field of  GRB 120811C (Barlow et al., GCN  13622) with 
0.45-m telescope of ISON-NM observatory  starting on  Aug. 12 (UT) 03:25:07. 
We took  several unfiltered images of 30 s exposures.  The optical afterglow 
(Denisenko et al., GCN 13623) is marginally detected in co-added frames at 
coordinates (J2000) 13:18:43.98 +62:18:03.4 with uncertainty of 0.5 arcsec 
in both coordinates.  A preliminary  photometry of co-added frames is based 
on the USNO-B1.0 (R2)  nearby  stars is following:

T_start,     T0+,           Exposure,  OT,              UL (3 sigma)
(UT)           mid, d         (s)

03:25:07   0.5095      1800           21.5 +/-0.5   21.2
Looking for U.S. government information and services? Visit