GCN Circular 25585
Subject
GRB 190829A: Liverpool Telescope optical photometry
Event
Date
2019-08-31T03:50:09Z (6 years ago)
From
Daniel Perley at Liverpool JMU <d.a.perley@ljmu.ac.uk>
D. A. Perley and A. M. Cockeram (LJMU) report:
We obtained observations of the afterglow of GRB 190829A (Dichiara et
al., GCN 25552; Lesage et al., GCN 25575; Xu et al., GCN 25555) with the
IO:O imager on the 2m robotic Liverpool Telescope. Two epochs of
imaging in the u, g, r, i, and z filters were acquired on 2019-08-30 UT
(at approximately 03:33 and 05:01) plus one epoch of g, r, in and z
imaging on 2019-08-31 UT (starting at 02:27). The afterglow is clearly
detected in griz in all three epochs. It is not detected in u-band.
For our most recent epoch, we report the following magnitudes after
subtraction of the presumptive host galaxy using PS1 catalog images
(times relative to the Swift trigger, in days):
t-t0 filt mag unc
------ ---- ----- ----
1.2715 i = 20.75 +/- 0.10
1.2809 g = 22.45 +/- 0.21
1.2903 r = 21.65 +/- 0.10
1.2996 z = 19.88 +/- 0.06
Further observations are planned.
DisclaimerNone