Spectroscopic classification of Gaia18czg (SN 2018hib) by NUTS (NOT Un-biased Transient Survey)
ATel #12131; Andrea Reguitti (Padua), M. Stritzinger (Aarhus), Subo Dong, Subhash Bose (KIAA-PKU) on behalf of the NUTS collaboration
on 19 Oct 2018; 12:38 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Subo Dong (dongsubo@pku.edu.cn)
Subjects: Optical, Supernovae, Transient
The Nordic Optical Telescope (NOT) Unbiased Transient Survey (NUTS; ATel #8992) reports the spectroscopic classification of Gaia18czg (SN 2018hib) discovered by Gaia on 2018-10-10.8 with a Gaia G-band magnitude of 17.16, and located in the Seyfert-2 galaxy ESO 417-G-006 (via SIMBAD).
Observations were performed with the 2.56 m Nordic Optical Telescope equipped with ALFOSC (range 350-950 nm; resolution 1.6-nm FWHM) on 2018-10-19.1 UT. Inspection of the spectrum reveals Gaia18czg/SN 2018hib is a Type-Ia supernova around maximum light. Comparison with a library of template supernovae spectra using SNID (Blondin and Tonry 2007) reveals good mataches with SN 2006gr and SN 2006S several days before maximum light. Adopting a red-shift of z=0.016 (De Vaucouleurs et al. 1991, Third Reference Catalogue of Bright Galaxies, Version 3.9), the location of maximum absorption of the SiII 635.5-nm profile suggests a blue-shifted Doppler velocity of approximately -10,500 km/s.
