Spectroscopic Classification of SN 2016bla (PTSS-16bwt) as a Type IIP Supernova
Jujia Zhang, Baoli Lun (YNAO), Xiaofeng Wang, Wenxiong Li, Zesheng Yang (Tsinghua University), Bin Li, Haibin Zhao, Lifan Wang (PMO), Zhijian Xu
We obtained an optical spectrum (range 330-880 nm) of SN 2016ayg, discovered by the PMO-Tsinghua Supernova Survey (PTSS: http://119.78.210.3/ptss2/ ), on UT Mar.30.6 2016 with the 2.4-m telescope (+YFOSC) at LiJiang Gaomeigu Station of Yunnan Astronomical Observatories (YNAO). The spectrum is consistent with a type IIP supernova at about three weeks after the maximum light, with prominent narrow emission line superimposed on broad Ha emission. 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 2004et at t = +20 days from the maximum light. After correcting for a redshift of 0.023 (from the narrow Ha emission line) for its host galaxy SDSS J074526.98+295326.4, an expansion velocity of about 8500 km/s can be derived from the absorption minimum of Ha line.
optical,supernovae,transient