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Spectroscopic classification of SN 2018kv as a type Ia supernova

ATel #11238; Jujia Zhang, Kaixing Lu (YNAO), Xiaofeng Wang, Zhijian Xu, Wenxiong Li (Tsinghua University), Tianmeng Zhang (NAOC), Hanjie Tan (Chinese Culture University), Zhitong Li, Hao Song, and Jun Mo (Tsinghua University
on 27 Jan 2018; 09:28 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 350-900 nm) of SN 2018kv, discovered by the Tsinghua-NAOC Transient Survey, on UT 2018 Jan. 26.9 with the Li-Jiang 2.4 m telescope (LJT+YFOSC) at Li-Jiang Observatory of Yunnan Observatories. The spectrum is consistent with that of a type Ia supernova at a few days after the 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 2006S at t = +4 days from the maximum light. After correcting for a redshift of 0.077 (via SNID fitting) an expansion velocity of about 10500 km/s can be derived from the absorption minimum of Si II 635.5 nm.