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 12486

GRB 111016A: optical upper limit
2011-10-23T19:32:31Z (13 years ago)
Alexei Pozanenko at IKI, Moscow <>
A. Volnova (SAI MSU), E. Litvinenko (UBAI), I. Molotov (KIAM), A. Pozanenko 
(IKI) on behalf of  larger GRB follow up collaboration report:

We observed the field of the Swift GRB 111016A (Mangano  et al., GCN  12439) 
with 40-cm telescope ORI-40 of Kitab ISON observatory on Oct. 16 starting on 
(UT) 22:07:26. On the stacked image we do not detect any source within the 
enhanced XRT error box (Evans et al., GCN  12441). The photometry is based 
on the reference star SDSS  101516.54+272642.0 assuming (after recalibration 
gri->R) R=17.77:

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

 22:07:26   0.15905  none  36*60       n/d  19.2
Looking for U.S. government information and services? Visit