[vsnet-grb-info 23539] LIGO/Virgo S190901ap: Keck I LRIS spectroscopy of ZTF19abvionh

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  25638
SUBJECT: LIGO/Virgo S190901ap: Keck I LRIS spectroscopy of ZTF19abvionh
DATE:    19/09/04 00:26:12 GMT
FROM:    Mansi M. Kasliwal at Caltech/Carnegie  <mansikasliwal at gmail.com>

Kevin Burdge (Caltech), Mansi M. Kasliwal (Caltech), Daniel A. Perley (LJMU)

report on behalf of the GROWTH collaboration

We obtained a Keck I LRIS spectrum of ZTF19abvionh (Kool et al. GCN 25616).
We see a hot, blue continuum and host galaxy lines at z=0.0985. The
corresponding luminosity distance of 456 Mpc is inconsistent with the GW
constraints on S190901ap (LVC et al. GCN 25614, GCN 25606) suggesting this
could evolve into a young supernova. Our conclusions are broadly consistent
with Rossell et al. GCN 25622.