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Spectroscopic Classification of SN 2017dkb (=PTSS-17slg) as a Type IIP Supernova

ATel #10336; Jujia Zhang, Xiaoguang Yu (YNAO), Wenxiong Li, Xiaofeng Wang (Tsinghua University), Hanjie Tan (Chinese Culture University), Bin Li, Zhijian Xu, Haibin Zhao, Lifan Wang (PMO), Danfeng Xiang, Liming Rui, Zesheng Yang (THU)
on 1 May 2017; 04:36 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 370-880 nm) of SN 2017dkb (=PTSS-17slg), discovered by the PMO-Tsinghua Supernova Survey (PTSS, http://www.cneost.org/ptss/ ), on UT Apr.30.81 2017 with the 2.4 m telescope (LJT + YFOSC) at LiJiang Gaomeigu Observatory of Yunnan Observatories (YNAO). The spectrum is consistent with that of a type II-P supernova at 2-3 weeks after 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 matches with SN 2006bp at t = +20 days from the maximum light. After correcting for a redshift of 0.016 (from the SNID fit) for its host galaxy 2MASX J18140283+2153135, an expansion velocity of about 10300 km/s can be derived from the absorption minimum of Ha line. The classification spectrum is also posted on the IAU Transient Name Sever: http://wis-tns.weizmann.ac.il/object/2017dkb/