GCN Circular 20448
Subject
GRB 170113A: LCO Sutherland observations
Date
2017-01-13T12:18:14Z (7 years ago)
From
Cristiano Guidorzi at Ferrara U,Italy <guidorzi@fe.infn.it>
C. Guidorzi (U. Ferrara), S. Kobayashi, I.A. Steele (LJMU), A. Gomboc
(U. Nova Gorica), C.G. Mundell (U. Bath) on behalf of a large
collaboration report:
We observed Swift GRB 170113A (Evans et al. GCN 20446) on January 13,
from 10:53:32 UT (50 minutes since the GRB) with 1-m LCO telescope units
in Sutherland with SDSS r and i filters. We clearly detect the
Swift-UVOT optical counterpart with the following values:
Mid Time Exposure Filter Magnitude (AB)
(hours) (s)
-------------------------------------------------------
0.89 5x60 SDSS-R 19.06 +- 0.11
0.89 5x60 SDSS-I 18.84 +- 0.08
-------------------------------------------------------
as calibrated against nearby USNO-UCAC4 sources.