Spectroscopic Classification of ASASSN-15gz as a Type Ia Supernova
ATel #7401; Jujia Zhang (Yunnan Observatories), Xiaofeng Wang (Tsinghua University)
on 16 Apr 2015; 04:33 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Tianmeng Zhang (armengjade@gmail.com)
Subjects: Optical, Supernovae, Transient
We report an optical spectrum (range 340-880 nm) of ASASSN-15gz that was obtained on Apr.15.8 2015 UT with the 2.4-m telescope (+YFOSC) at LiJiang Gaomeigu Station of YNAO. The spectrum is consistent with that of a type Ia supernova around the maximum light. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that it matches with SN 2003cg at t = -2 days since the explosion. Given a recession velocity of 10201 km/s for the host galaxy, an expansion velocity of about 12000 km/s can be deduced from the Si II absorption minimum.
