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 22716

GRB 180512A: LT prompt observations
2018-05-13T08:31:12Z (6 years ago)
Cristiano Guidorzi at Ferrara U,Italy <>
C. Guidorzi, R. Martone (U. Ferrara), S. Kobayashi (LJMU), C.G. Mundell 
(U. Bath), A. Gomboc (U. Nova Gorica), I.A. Steele (LJMU) on behalf of a 
large collaboration report:

The 2-m Liverpool Telescope automatically began observing Swift GRB 
180512A (Deich et al. GCN 22710) on May 12, 22:07:15 UT (5.5 minutes 
since the GRB) with the RINGO3 polarimeter and the IO:O camera in the 
SDSS-R filter. Within the enhanced XRT error circle (Evans et al. GCN 
22715) we do not detect any optical counterpart down to the following 

Mid time since GRB�������� Exp�������������� Filter���������������� Magnitude
(hrs)���������������������������������� (s)
0.64���������������������������������� 6x10������������ SDSS-R������������������ > 20.8

as calibrated against nearby SDSS objects.
Looking for U.S. government information and services? Visit