Classification of SN 2018ivc (=DLT18aq) as a Young Type II Supernova
ATel #12240; Xinhan Zhang (Tsinghua University), Jujia Zhang, Xiaoli Wang (YNAO), Xiaofeng Wang, Hanna Sai, Han Lin, Danfeng Xiang, Liming Rui (Tsinghua Univeristy), Yue Wang, Junbo Zhang, Tianmeng Zhang, Huijuan Wang (NAOC)
on 25 Nov 2018; 01:17 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Xiaofeng Wang (wang_xf@mail.tsinghua.edu.cn)
Subjects: Optical, Supernovae, Transient
Referred to by ATel #: 12289
We obtained optical spectra (range 360-870 nm) of SN 2018ivc(=DLT18aq) in M77, discovered by DLT40, on UT October 24.5 and 24.7 2018 with the Xinglong 2.16-m telescope (+BFOSC) of National Astronomical Observatories of China (NAOC) and Lijiang 2.4-m telescope at Gaomeigu Station of Yunnan Astronomical Observatories (YNAO), respectively. The spectra are consistent with that of a young type II supernova that suffered significant host-galaxy reddening, with the equivalent width of the Na I absorption being measured as about 2.5 Angstrom. A prominent absorption feature detected at around 627.0 nm can be due to the Ha line. The narrow Ha emission supposed on the continuum seems to show a double peak structure, with an FWHM velocity of 1200 km/s. Adopting a redshift of 0.0038 for the host galaxy (Huchra et al. 1999, ApJS,121, 287), an expansion velocity of 13500 km/s can be inferred for this SN. Followup observations are encouraged.
