GCN Circular 30271
Subject
GRB 210619B: Liverpool telescope imaging of a red afterglow
Date
2021-06-20T11:14:52Z (3 years ago)
From
Daniel Perley at Liverpool JMU <d.a.perley@ljmu.ac.uk>
D. A. Perley (LJMU) reports:
We acquired multicolor imaging of the optical afterglow of GRB 210619B
(D'Avanzo et al., GCN 30261) using the IO:O camera of the 2m robotic
Liverpool Telescope. The afterglow was observed twice in the ugriz
filters on 2021-06-20 UT, with the first epoch taking place between
02:35:06 and 02:42:40 and the second between 03:49:15 and 03:56:49.
Photometry with reference to Pan-STARRS 1 secondary standard stars in
the field gives the following magnitudes:
t-tburst(d) filter mag unc
0.10772 g 18.58 0.03
0.10879 r 17.82 0.03
0.10984 i 17.44 0.04
0.11227 z 17.17 0.04
0.15920 g 18.93 0.03
0.16028 r 18.11 0.03
0.16133 i 17.74 0.04
0.16376 z 17.47 0.04
These values have not been corrected for Galactic extintion.
The colors (after applying a Galactic extinction correction) suggest a
moderately dust-reddened afterglow.
DisclaimerNone