Spectroscopic Classification of SN 2017aap as a Type Ia Supernova
ATel #10044; Jujia Zhang, Yuxin Xin (YNAO), Zhijian Xu, Wenxiong Li, Xiaofeng Wang (Tsinghua University), Bin Li, Haibin Zhao, Lifan Wang (PMO), Hanjie Tan (Chinese Culture University), Liming Rui, Zesheng Yang (Tsinghua University)
on 3 Feb 2017; 04:34 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 340-830 nm) of SN 2017aap (=PTSS-17die), discovered by the PMO-Tsinghua Supernova Survey (PTSS, http://www.cneost.org/ptss/ ), on UT Feb.02.9 2017 with the 2.4 m telescope (LJT + YFOSC) at LiJiang Gaomeigu Observatory of Yunnan Observatories (YNAO). The spectrum is consistent with that of a type Ia supernova at about one week 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 2003du at t = +8 days from the maximum light. After correcting for a redshift of 0.110 for its host galaxy SDSS J113618.34+380706.8 (from narrow emission line of Ha), an expansion velocity of about 9600 km/s can be derived from the absorption minimum of Si II 635.5nm.
