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Spectroscopic Classification of AT 2016G as a Broadlined Type Ic Supernova

ATel #8528; Jujia Zhang (YNAO), Xiaofeng Wang (Tsinghua University)
on 11 Jan 2016; 03:36 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 #: 8535

We report an optical spectrum (range 350-900 nm) of AT 2016G that was obtained on UT Jan. 10.6 2015 with the 2.4-m telescope (+YFOSC) at the Gaomeigu Station of Yunnan Astronomical Observatories of China. The spectrum is consistent with that of a broadlined type Ic supernova at a few days after the explosion. Cross-correlation with a library of supernova spectra using the spectral comparison tool Gelato (Harutyunyan et al., 2008, A&A, 488, 383) shows that it matches with SN 2007ru at t = +4.6 days from the explosion. After removing the redshift of 0.009 for its host galaxy NGC 1171, we derive the expansion velocity as about 22000 km/s from the absorption minimum of the Si II 635.5 nm line.