Spectroscopic Classification of ASASSN-15db as a Type Ia Supernova
ATel #7086; Jujia Zhang (Yunnan Observatories), Xiaofeng Wang (Tsinghua University)
on 17 Feb 2015; 02:38 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Tianmeng Zhang (armengjade@gmail.com)
Subjects: Optical, Supernovae, Transient
We report an optical spectrum (range 340-900 nm) of ASASSN-15db (ATEL #7078) that was obtained on Feb. 16.9 2015 UT with the 2.4-m telescope (+YFOSC) at LiJiang Gaomeigu Station of YNAO. The spectrum is consistent with a type Ia supernova at a few days before the maximum light. 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 2003kf at t = -4.1 days. Adopting a recession velocity of 3297 km/s for the host galaxy NGC 5996, we measure a velocity of the Si II 635.5-nm absorption feature as about 11200 km/s.
