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Spectroscopic Classification of SN 2017mt as a Type Ia Supernova

ATel #10016; Jujia Zhang, Yuxin Xin (YNAO), Xiaofeng Wang, Wenxiong Li, Liming Rui (Tsinghua University), Zhijian Xu, Bin Li, Haibin Zhao, Lifan Wang (PMO), Hanjie Tan (CCU), Feng Xiao, Tianmeng Zhang (NAOC)
on 28 Jan 2017; 01:57 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ju-Jia Zhang (jujia@ynao.ac.cn)

Subjects: Optical, Supernovae

We obtained an optical spectrum (range 370-870 nm) of SN 2017mt, discovered by the PMO-Tsinghua Supernova Survey (PTSS), on UT Jan.27.9 2017 with the 2.4 m telescope (LJT + YFOSC) at LiJiang Observatory of Yunnan Observatories (YNAO). The spectrum is consistent with that of a type Ia supernova around maximum light. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, ApJ, 666, 1024) shows that it matches with SN 1992A at t = -1 days from the maximum light. After correcting for a redshift of 0.096 for its host galaxy SDSS J095944.71+273852.3, an expansion velocity of about 13000 km/s can be derived from the absorption minimum of Si II 635.5nm.