Spectroscopic Classification of PSN J23560655+2922423 as a Peculiar Type Ia Supernova
ATel #6611; Jujia Zhang (Yunnan Observatories) and Xiaofeng Wang(Tsinghua University)
on 23 Oct 2014; 02:46 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 350-880 nm) of PSN J23560655+2922423 that was obtained on 2014 Oct.22.76 UT with the 2.4-m telescope (+YFOSC) at LiJiang Gaomeigu Station of Yunnan Observatories. The spectrum shows that is a peculiar type Ia supernova at about one week before the maximum light. Cross-correlation with a library of supernova spectra using SNID (Harutyunyan et al. 2008, A&A, 488, 383) shows that it matches with SN 2005hk at t = - 6 days. Given a redshift of 0.023 for the host galaxy UGC 12850 (Springob et al. 2005, ApJ.Supp., 160, 149), an expansion velocity of about 6200 km/s can be deduced from the Si II 635.5 absorption minimum. Follow-up observations are encouraged.
