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Spectroscopic Classification of SN 2017hqf (=PTSS-17ygv) as a Type Ia Supernova

ATel #10980; Han Lin, Xiaofeng Wang, Danfeng Xiang, Wenxiong LI, Liming Rui (Tsinghua University), Hong Wu, Peng Qiu (NAOC), Zhijian Xu, Bin Li, Haibin Zhao, Lifan Wang (PMO), Jujia Zhang (YNAO), and Tianmeng Zhang (NAOC)
on 17 Nov 2017; 14:09 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Xiaofeng Wang (wang_xf@mail.tsinghua.edu.cn)

Subjects: Optical, Supernovae, Transient

We obtained an optical spectrum (range 360-840 nm) of SN 2017hqf(PTSS-17ygv), discovered by the PMO-Tsinghua Supernova Survey (PTSS, http://www.cneost.org/ptss/ ), on UT 2017 Nov. 16.85 with the Xinglong 2.16 m telescope (BFOSC) at Xinglong Observatory of NAOC. The spectrum is consistent with that of a type Ia supernova at about two weeks 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 1995D at t = +14 days from the maximum light. After correcting for a redshift of 0.047 (from SNID fit) an expansion velocity of about 9800 km/s can be derived from the absorption minimum of Si II 635.5 nm.