GCN Circular 24314
Subject
LIGO/Virgo S190425z: Liverpool Telescope imaging of ZTF19aasckkq
Date
2019-04-28T00:46:18Z (5 years ago)
From
Daniel Perley at Liverpool JMU <d.a.perley@ljmu.ac.uk>
D. A. Perley, C. M. Copperwheat, and K. L. Taggart (LJMU) report on
behalf of the Global Relay of Observatories Watching Transients Happen
(GROWTH) collaboration:
We acquired a series of 60-second exposures of ZTF19aasckkq (Anand et
al., GCN 24311), an optical transient in the error region of LIGO/Virgo
S190425z (GCN 24168), using the IO:O imager on the 2m Liverpool
Telescope in the u, g, r, i, and z filters between 03:17:56 and 03:30:00
UT on 2019-04-27.
The transient is detected with the following magnitudes (measured after
image subtraction and calibrated relative to PS1):
JD magnitude
2458600.6384 g = 20.66 +/- 0.18
2458600.6395 r = 20.37 +/- 0.17
2458600.6406 i = 20.28 +/- 0.23
2458600.6416 z = 20.09 +/- 0.38
It is not detected in u-band. These suggest a moderately but not
extremely red transient and show no obvious evolution relative to the
ZTF imaging on 2019-04-26 (g = 20.86 +/- 0.18).
DisclaimerNone