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Spectroscopic Classification of SN 2016frp (= PTSS-16mvz) as a Peculiar Type Ib Supernova

ATel #9464; Liming Rui, Xiaofeng Wang, Wenxiong Li, Zesheng Yang (Tsinghua Univeristy), Zhijian Xu, Bin Li, Lifan Wang, Haibin Zhao (PMO), Junjun Jia, Hong Wu, Tianmeng Zhang (NAOC), and Jujia Zhang (YNAO)
on 6 Sep 2016; 17:47 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 370-860 nm) of SN 2016frp (= PTSS-16mvz), discovered by PMO-Tsinghua Supernova Survey (PTSS; ), on UT Sep.05.7 2016 with the 2.16-m telescope (+BFOSC) at Xinglong Station of NAOC. The spectrum is consistent with that of a peculiar type Ib supernova at about one week before 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 2005bf at t=-6 days from the peak. After correcting for a redshift of 0.027 for its host galaxy GALEXASC J002132.53-055728.4 (from the narrow Ha line), an expansion velocity of about 9000 km/s can be derived from the absorption minimum of He I 587.6nm.