LJT Spectroscopic Classification of AT 2021dbg (ATLAS21gfy) as a Young Type II Supernova with flash features
ATel #14398; Jujia Zhang, Qian Zhai (YNAO); Xiaofeng Wang(THU)
on 17 Feb 2021; 02:14 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 350-860 nm) of AT 2021dbg (ATLAS21gfy) on UT Feb.16.7, 2021, with the LiJiang 2.4 m telescope (LJT + YFOSC) of Yunnan Observatories (YNAO). The spectrum shows blue continuum and flash features (e.g., NV, He II, and Halpha) consistent with a young type II supernova. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, ApJ, 666, 1024) shows that it matches with SN 1998S at t = -13 days from the maximum light. The spectrum is available at TNS (https://www.wis-tns.org/object/2021dbg).
