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Spectroscopic Classification of AT 2016aip (PS16ajy) as a Type II-P Supernova

ATel #8711; Wei-Min Yi and Ju-Jia Zhang (Yunnan observatories)
on 19 Feb 2016; 01:30 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 400-800 nm) of AT 2016aip (PS16ajy) on UT 2016 Feb. 18.54 with the Li-Jiang 2.4 m telescope (LJT + YFOSC) at Li-Jiang observatory of Yunnan Observatories. The spectrum is similar to that of a Type-IIP supernova at some days after explosion. 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 SN 2005cs at t = +18 days since the explosion. Adopting a redshift z = 0.016 derived from SNID fit, an expansion velocity of about 5000 km/s can be deduced from the H-alpha absorption minimum.