GCN Circular 22991
Subject
GRB 180720C: LT observations
Date
2018-07-21T08:22:42Z (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 robotic Liverpool Telescope automatically began observing Swift
GRB 180720C (LaPorte et al. GCN 22982) on July 20, 22:28:18 UT (261
seconds after the GRB trigger time) with the RINGO3 polarimeter and the
IO:O camera in the SDSS-R filter. Within the enhanced Swift-XRT error
circle (Evans et al. GCN 22987) we do not find any uncatalogued object
down to r'>20.4 mag at a mid time of 47 minutes post GRB with a 3x10s
exposure, as calibrated against nearby Pan-STARRS objects.