Spectroscopic Classification of SN 2016iae as a Young Type Ic Supernova
ATel #9755; Jujia Zhang, Chuanjun Wang (YNAO), Xiaofeng Wang, Liming Rui (Tsinghua University)
on 13 Nov 2016; 00:38 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 350-910 nm) of SN 2016iae, discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS), on UT Nov.12.7 with the 2.4m telescope (+YFOSC) at Lijiang Observatory of YNAO. The spectrum is consistent with that of a young type Ic supernova at about one week before the maximum light. A prominent narrow absorption of Na I D lines can be seen in the spectrum, with an equilavent width of about 2.5 Angstrom, suggesting that this supernova may suffer a significant host-galaxy reddening. Cross-correlation with a library of supernova spectra using the spectral comparison tool Gelato (Harutyunyan et al., 2008, A&A,488, 383) shows that the spectrum matches with SN 2007gr at t = -10 days from the maximum light. After correcting for a redshift of 0.0035 for its host galaxy NGC 1532, the expansion velocities inferred from the absorption minima of Si II 635.5 nm,C I 658.0 nm, and O I 777.4 nm are about 11100 km/s, 11900 km/s, and 12700 km/s, respectively.
