GCN Circular 22716
Subject
GRB 180512A: LT prompt observations
Date
2018-05-13T08:31:12Z (6 years ago)
From
Cristiano Guidorzi at Ferrara U,Italy <guidorzi@fe.infn.it>
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
magnitude:
Mid time since GRB�������� Exp�������������� Filter���������������� Magnitude
(hrs)���������������������������������� (s)
-----------------------------------------------------------
0.64���������������������������������� 6x10������������ SDSS-R������������������ > 20.8
-----------------------------------------------------------
as calibrated against nearby SDSS objects.