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LJT Spectroscopic Classification of AT2019uze (ZTF19acshkft) as a Young Type Ia Supernova

ATel #13293; Jujia Zhang, Lifeng Wang (YNAO); Xiaofeng Wang (THU)
on 18 Nov 2019; 08:06 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ju-Jia Zhang (jujia@ynao.ac.cn)

Subjects: Optical, Supernovae

We obtained an optical spectrum (range 350-880 nm) of AT2019uze (ZTF19acshkft), discovered by the ZTF Survey, on UT Nov. 17.69 2019, with the Lijiang 2.4-m telescope (LJT + YFOSC) at the Lijiang Observatory of Yunnan Observatories (YNAO). The spectrum is consistent with a type Ia supernovae at a few days 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 the normal SN Ia SN 2006S at t = -6 days from the maximum light. The redshift derived from the best match of SNID is about 0.083. The weak/absence of Si II 6355 might due to the low S/N of this spectrum or indicate a relatively high temperature at this phase like a typical feature of the 91T-like event.