Spectroscopic Classification of ASASSN-14in as a Type Ia Supernova
ATel #6545; Jujia Zhang (Yunnan Observatories) and Xiaofeng Wang(Tsinghua University)
on 6 Oct 2014; 14:31 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Xiaofeng Wang (wang_xf@mail.tsinghua.edu.cn)
Subjects: Optical, Supernovae, Transient
An optical spectrogram (range 340-880 nm), obtained on 2014 Oct.06.5 UT with the 2.4-m telescope (+YFOSC) at LiJiang Gaomeigu Station of YNAO, shows that ASASSN-14in (discovered by All Sky Automated Survey for SuperNovae) is a type Ia supernova a few days before the maximum light. 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 1990O at t = -6 days. An expansion velocity of about 12400 km/s can be inferred from the Si II 635.5-nm absorption minimum if a redshift of 0.033 is adopted for the host galaxy in terms of the SNID fit.
