GCN Circular 22803
Subject
GRB 180620A: LCO McDonald observations
Date
2018-06-20T12:01:56Z (6 years ago)
From
Cristiano Guidorzi at Ferrara U,Italy <guidorzi@fe.infn.it>
C. Guidorzi (U. Ferrara), S. Kobayashi (LJMU), C.G. Mundell (U. Bath),
A. Gomboc (U. Nova Gorica), I.A. Steele (LJMU), A. Cucchiara (U. of
Virgin Islands) on behalf of a large collaboration report:
The LCO 1-m unit at McDonald Observatory began observing Swift GRB
180620A (Evans et al. GCN 22798) on June 20, 08:55 UT (20 min since the
GRB trigger time) with the SDSS griz filters. The optical counterpart
(Evans et al.; Butler et al. GCN 22799; Elenin et al. GCN 22800; Tyurina
et al. GCN 22801) is clearly detected in each individual frame with the
following magnitudes:
Mid Time since GRB��� Exposure�������� Filter������� Magnitude
(hrs)����������������� (s)
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0.349���������������� 1x120����������� SDSS-R������� 18.63 +- 0.04
0.583���������������� 1x120����������� SDSS-I������� 18.27 +- 0.04
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as calibrated against nearby PanSTARRS objects.