Spectroscopic Classification of AT 2019va as a Type IIP Supernova
ATel #12408; Jujia Zhang, Kaixing Lu (YNAO); Xiaofeng Wang(THU)
on 19 Jan 2019; 00:15 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ju-Jia Zhang (jujia@ynao.ac.cn)
Subjects: Optical, Supernovae
We obtained an optical spectrum (range 350-870 nm) of AT 2019va (=ATLAS19bqg =MASTER OT 133514.71+444557.7), discovered by the ATLAS and MASTER independently, on UT Jan.18.91 2019 with the 2.4 m telescope (LJT + YFOSC) at LiJiang Observatory of Yunnan Observatories (YNAO). The spectrum shows blue continuum and P-Cyg H Balmer and He I suggests a type IIP supernova at the relatively early phase. Cross-correlation with a library of supernova spectra using the spectral comparison tool Gelato (Harutyunyan et al.,2008, A&A,488, 383) shows that the spectrum matches with SN 1999em at t = +5 days from the maximum light.
After correcting for a redshift of 0.0088 for its host galaxy UGC 8577 an expansion velocity of about 14000 km/s can be derived from the absorption minimum of H alpha and HeI 587.6 nm. The classification spectrum is also posted on the IAU Transient Name Sever: https://wis-tns.weizmann.ac.il/object/2019va
