Spectroscopic Classification of SN 2016bly (=PTSS16-cuh) as a Type IIn Supernova
ATel #8933; Jujia Zhang, Chuanjun Wang (YNAO), Xiaofeng Wang, Wenxiong Li, Zesheng Yang (Tsinghua University), Bin Li, Zhijian Xu, Haibin Zhao, Lifan Wang (PMO)
on 11 Apr 2016; 06:13 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 340-900 nm) of SN 2016bly (=PTSS-16cuh), discovered by the PMO-Tsinghua Supernova Survey (PTSS: http://119.78.210.3/ptss2/ ), on UT Apr.10.8 2016 with the 2.4-m telescope (+YFOSC) at LiJiang Gaomeigu Station of Yunnan Astronomical Observatories (YNAO). The spectrum is similar to that of a type IIn supernova at about two weeks after the maximum light, characterized by blue continuum and prominent Ca II near-infrared (NIR) triplet absorptions. Cross-correlation with a library of supernova spectra using the spectral comparison tool Gelato (Harutyunyan et al., 2008, A&A, 488, 383) shows that it matches with SN 2005gj at t = +12 days from the explosion. After correcting for a redshift of 0.0194 (from the narrow Ha emission line) for its host galaxy 2MASX J17224883+1400584, an expansion velocity of about 5000 km/s can be derived from the absorption minimum of Ca II NIR triplet.
