GCN Circular 22603
Subject
GRB 180404A: LCO FTS observations
Date
2018-04-05T09:36:04Z (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:
We began observing Swift GRB180404A (Gropp et al. GCN 22589) on April 4,
09:30 UT (0.36 days post burst) with the LCO 2-m Faulkes Telescope South
unit in Siding Springs in the SDSS-R filter. We marginally detect the
optical afterglow (Gropp et al.; Selsing et al. GCN 22591) with the
following magnitude:
Mid time since GRB���� Exp������� Filter�������� Magnitude
(days)���������������� (s)
-------------------------------------------------------------
0.37������������������ 5x120����� SDSS-R�������� 21.3 +- 0.3
-------------------------------------------------------------
as calibrated against nearby USNO UCAC4 objects.