LJT Spectroscopic Classification of AT 2023eoc as a young SN Ia
ATel #15982; Qian Zhai, Yongzhi Cai, Jujia Zhang (YNAO); Liping Li (Yunnan Unversity); Xiaofeng Wang (THU)
on 7 Apr 2023; 20:09 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 360-870 nm) of AT 2023eoc on UT 2023 April 7.8 with the Li-Jiang 2.4 m telescope (LJT+YFOSC) at the Li-Jiang Observatory of Yunnan Observatories. The spectrum was matched to that of a young Type Ia supernova about two weeks before maximum. 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 SN 1999ee at t = -9 days. The redshift obtained from SNID is 0.036, and the expansion velocity derived from the absorption minimum of Si II 6355 is ~17000 km/s.
