Spectroscopic Classification of CSS141118:092034+504148 as a Type II-P Supernova
ATel #6898; Wenxiong Li, Xiaofeng Wang (Tsinghua University), Tianmeng Zhang (National Astronomical Observatories of China)
on 11 Jan 2015; 05:46 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Xiaofeng Wang (wang_xf@mail.tsinghua.edu.cn)
Subjects: Optical, Supernovae, Transient
We report an optical spectrogram (range 370-850 nm) of CSS141118:092034+504148 that was obtained on 2015 Jan.08.71 UT with the 2.16-m telescope (+BFOSC) at Xinglong Station of NAOC. The spectrum is similar to that of a type II-P supernovae over one month after explosion, with prominent P-Cygni profiles of Balmer lines. Cross-correlation with a library of supernova spectra using the comparison tool Gelato (Harutyunyan et al. 2008, A&A, 488, 383) shows that it matches with SN 2012A at t=50 days since explosion. Given a redshift of 0.028 for the host galaxy (from emission features of supernova lines), an expansion velocity of about 6300 km/s can be deduced from the Ha absorption minimum.
