GCN Circular 24204
Subject
LIGO/Virgo S190425z: Liverpool Telescope spectroscopy of ZTF19aarykkb
Date
2019-04-26T02:17:57Z (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 GROWTH collaboration:
We obtained two 600-second exposures of ZTF19aarykkb (Kasliwal et al.,
GCN 24191) using the Spectrograph for the Rapid Acquisition of
Transients (SPRAT) on the 2m Liverpool Telescope.
The reduced 1D spectrum shows a broad (full-width ~ 15000 km/s) emission
line centered at 6700 Angstroms, which we associate with broad H-alpha
from the transient. Narrow H-alpha emission at z=0.025 (likely from the
host galaxy) is also detected. We cannot confirm the presence of He II
(tentatively reported by Pavana et al., GCN 24200) or any other
significant features at this time. These observations suggest that this
source is a young Type II supernova, and is unlikely to be associated
with the BNS merger S190425z (GCN 24168).
DisclaimerNone