Spectroscopic Classification of CSS150118:133209+344127 as a Type Ia Supernova
ATel #6958; Jujia Zhang (Yunnan Observatories) and Xiaofeng Wang (Tsinghua University)
on 20 Jan 2015; 02:41 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 330-870 nm) of CSS150118:133209+344127 on UT 2015 Jan.19.9 with the 2.4-m telescope (+YFOSC) at LiJiang Gaomeigu Station of Yunnan Observatories. The spectrum is similar to that of a type Ia supernovae at around the maximum light. Cross-correlation with a library of supernova spectra using the comparison tool SNID ((Blondin and Tonry 2007, ApJ, 666, 1024) shows that it matches with SN 2005cf at t = -1 days. Given a redshift of 0.050 (from the SNID fit) for the host galaxy, an expansion velocity of about 10200 km/s can be deduced from the Si II 635.5 absorption minimum.
