Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 24205

LIGO/Virgo S190425z: SALT spectroscopy of ZTF19aarzaod as a likely type II supernova
2019-04-26T02:47:57Z (5 years ago)
Saurabh Jha at Rutgers U <>
D.A.H. Buckley (SAAO), S. W. Jha (Rutgers), J. Cooke (Swinburne), and M.
Mogotsi (SALT/SAAO) report on behalf of the SALT GW collaboration:

We obtained an 1600-sec spectrum of ZTF19aarzaod (=AT 2019dzw; Kasliwal et al.
2019, GCN 24191) with SALT (+RSS) using the PG0300 line grating. The target is
well detected with a red continuum and a broad (~8000 km/s FWHM) H-alpha
emission feature at the redshift of the host galaxy, z=0.028. The data are
consistent with ZTF19aarzaod being a type II supernova, with the red color
likely a result of the heavy Milky Way extinction A_V = 2.2 (Schlafly &
Finkbeiner 2011, ApJ, 737, 103).
Looking for U.S. government information and services? Visit