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 11589

GRB 110112A: optical upper limit
2011-01-20T21:37:07Z (13 years ago)
Alexei Pozanenko at IKI, Moscow <>
K. Grankin, V. Rumyantsev (CrAO), A. Pozanenko (IKI) report on behalf of 
larger GRB  follow-up collaboration:

We observed  the field of the Swift GRB 110112A (Stamatikos  et al., GCN 
11553)  with AZT-11 telescope of CrAO starting on Jan. 12 (UT) 16:35. In the 
enhanced Swift-XRT position  (Evanset al., GCN 11556) we do not detect 
optical afterglow (Xin et al., GCN 11554) up to R=20.6. The photometry is 
based on the
USNO B1.0 star 1164-0563915 (21 59 45.42 +26 27 18.3) assuming R=15.64.

T0+      Filter,   Exposure, mag.
(mid, d)              (s)

0.52955  R 13x180  R   >20.6
Looking for U.S. government information and services? Visit