SALT spectroscopic classification of DLT18ab (= SN 2018cuf) as a type-II supernova before maximum light
ATel #11777; S. W. Jha, Y. Camacho, M. Dai, K. Dettman (Rutgers), D. Sand, S. Wyatt (UA), S. Valenti (UC Davis), R. Foley (UC Santa Cruz), I. Monageng (SALT/SAAO)
on 25 Jun 2018; 15:23 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Saurabh Jha (saurabh@physics.rutgers.edu)
Subjects: Optical, Supernovae
We obtained SALT (+RSS) spectroscopy of DLT18ab (= SN 2018cuf; ATel #11770) on 2018 June 25.0 UT, covering the wavelength range 350-730 nm, under cloudy conditions. The spectrum shows a blue continuum with broad features of H-alpha and likely H-beta. Cross-correlation of the supernova spectrum with a template library using SNID (Blondin & Tonry 2007, ApJ, 666, 1024) shows good matches to the type-IIP SN 1999em and 1999gi a few days before maximum light and reasonably consistent with the redshift of the host galaxy IC 5092, z = 0.0108 (from HIPASS via NED; Meyer et al. 2004, MNRAS, 350, 1195). The expansion velocity measured from peak to trough of the H-alpha profile is approximately 12,000 km/s.
Our spectrum is posted on the Transient Name Server SN 2018cuf page.
