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Spectroscopic classifications of ASASSN-17rj as a type Ia supernova

ATel #11099; S. Bose, Subo Dong (KIAA-PKU), D. A. H. Buckley (SAAO), M. Gromadzki (Warsaw)
on 28 Dec 2017; 04:52 UT
Credential Certification: Subo Dong (dongsubo@pku.edu.cn)

Subjects: Optical, Supernovae

We report the optical spectroscopic observation of the supernova candidate ASASSN-17rj (2017jdy) using SALT/RSS (350.0-920.0 nm) on UT 2017-12-25 22:50:54 with 1200s exposure time. The target was discovered by All-Sky Automated Survey for Supernovae (ASAS-SN, Shappee et al. 2014). We used SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) to identify the type, phase, and redshift of the SN spectra. The spectra matches with SNe Ia near peak at an approximate redshift of z=0.066. It is worth noting that, on archival Pan-STARRS images the position of the supernova coincides with a faint object, which is likely the host galaxy of the SN.