Magellan Clay/LDSS3 Spectroscopic Classification of the Intracluster Supernova ASASSN-18nt as SN 1991bg-like Type Ia Supernova
ATel #11763; Subo Dong, Subhash Bose, Ping Chen (KIAA-PKU), Nidia Morrell (LCO), Juna Kollmeier (Carnegie), K. Z. Stanek (OSU)
on 22 Jun 2018; 17:20 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)
Subjects: Optical, Supernovae
Referred to by ATel #: 12315
We report the spectroscopic observation of the supernova candidate
ASASSN-18nt (2018ctv) using the Low Dispersion Survey Spectrograph 3
(LDSS3) mounted on the 6.5m Magellan Clay telescope on UT 2018-06-22
10:28:44. The target was discovered as an intracluster supernova
candidate in Abell 0194 (z=0.018) by All-Sky Automated Survey for
Supernovae (ASAS-SN, Shappee et al. 2014) at g ~ 17.2 mag on UT
2018-06-21 04:19:12, as reported in ATel #11762. We used SNID (Blondin &
Tonry, 2007, ApJ, 666, 1024) to identify the type, phase, and redshift
of the SN spectra. The spectra matches with SN 1991bg-like SNe Ia near
peak. The redshifts derived from the best-fit templates are consistent
with that of Abell 0194. The luminosity derived from ASAS-SN discovery
magnitude is ~ -17.4 (assuming Galactic A_g = 0.15), consistent with a
91bg-like event near the peak.
