Lijiang 2.4-m telescope Spectroscopic Classification of AT 2018hlr (=PTSS-18jmj) as a Type Ia Supernova
ATel #12141; Jujia Zhang, Xu Ding (YNAO), Hanna Sai, Xiaofeng Wang (THU), Zhijian Xu, Wenxiong Li(THU), Bin Li (PMO),Xinghan Zhang (THU),Hanjie Tan(NCU),Haibin Zhao(PMO),Lifan Wang (PMO/TAMU),
on 23 Oct 2018; 05:13 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Xiaofeng Wang (wang_xf@mail.tsinghua.edu.cn)
Subjects: Optical, Supernovae, Transient
Referred to by ATel #: 12143
We obtained an optical spectrum (range 350-890 nm) of AT 2018hlr (=PTSS-18jmj), discovered by PTSS (PMO-THU Supernova Survey), on UT Oct 22.5 2018 with the Lijiang 2.4-m telescope (LJT+YFOSC) at Gaomeigu Station of Yunnan Observatories (YNAO). The spectrum is consistent with that of a SN 1991T/1999aa-like type Ia supernova around 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 matched SN 2005M at about 3 days before the maximum light. After correcting for a redshift of 0.059 for its host galaxy SDSS J182033.43+415807.3 (from the SNID fit), an expansion velocity of about 10500 km/s be derived from the absorption minimum of Si II 6355 line.
