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Spectroscopic classification of ASASSN-16pj as a normal Type Ia supernova

ATel #9916; M. K. Seidel, Mark Seibert (Carnegie Observatories), N. Morrell (Las Campanas Observatory), Benjamin J. Shappee (Hubble Fellow, Carnegie Observatories)
on 30 Dec 2016; 04:52 UT
Credential Certification: Benjamin Shappee (bshappee@obs.carnegiescience.edu)

Subjects: Optical, Supernovae

We report optical spectroscopic observation of supernova candidate ASASSN-16pj (ATel #9914, AT 2016jdk) using the du Pont 2.5-m telescope (+ WFCCD) at Las Campanas Observatory on UT 2016-12-30.05. The target was discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN; Shappee et al. 2014, ApJ, 788, 48). We used SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) to identify the type and phase of the SN spectra.

The spectrum matches with SNe Ia-norm, 4-7 days before maximum. The Si II expansion velocity is ~10700 km/s. Finally, redshift estimates from both H-alpha and SNID are consistent with z=0.036.