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Spectroscopic Classifications of SN 2017ilf (=ASASSN-17pp) and SN 2017ijx as Type Ia Supernovae

ATel #11012; Han Lin, Danfeng Xiang, Xiaofeng Wang, Liming Rui, Xinhan Zhang (Tsinghua University), Junjun Jia, Tianmeng Zhang (NAOC), and Jujia Zhang (YNAO)
on 27 Nov 2017; 08:39 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Xiaofeng Wang (wang_xf@mail.tsinghua.edu.cn)

Subjects: Optical, Supernovae, Transient

We obtained optical spectra (range 360-860 nm) of SN 2017ilf (=ASASSN-17pp) and SN 2017ijx, discovered by ASASSN and Koichi Itagaki, on UT 2017 Nov. 26.8 with the 2.16 m telescope (BFOSC) at Xinglong Observatory of NAOC. Comparing with a library of supernova spectra (SNID, Blondin & Tonry 2007, ApJ, 666,1024), we found that both these two transients are similar to normal SNe Ia within a few days from the maximum light. An expansion velocity of about 10500 km/s and 10200 km/s can be inferred for SN 2017ilf and SN 2017ijx, respectively, from the absorption minima of Si II 635.5nm line in their spectra.