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 12177

GRB 110719A: optical upper limit
2011-07-19T15:54:18Z (13 years ago)
Alexei Pozanenko at IKI, Moscow <>
A. Volnova (SAI MSU), L. Elenin (ISON), I. Molotov (ISON), A. Pozanenko 
(IKI) report on behalf of larger GRB  follow-up collaboration:

We observed the field of  GRB 110719A (Sakamoto  et al. GCN 12173) with 
0.45-m telescope �f ISON-NM observatory  on  July 19 starting (UT) 06:54:39. 
We took 30 unfiltered images.  In a stacked image we do not detect any 
source within enhanced XRT error circle (Goad et al., GCN 12176) up to 
19.7m.  The photometry is based on the USNO-B1.0  1245-0023215 star 
(RA=01:38:11.95, Dec=+34:35:52.6) assuming R=13.72.

T0+         Filter,   Exposure, OT,   Upper Limit
(mid, d)               (s)

0.04370  none     30x60s     n/d    19.7
Looking for U.S. government information and services? Visit