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WiFeS Classification of KSN 2017B/AT2017ejc as a Type Ia Supernova

ATel #10513; B. E. Tucker, M. S. Bessell (Mt Stromlo Observatory, ANU), A. Rest (STScI), S. Smartt, K. Smith (QUB), K. Chambers, M. Huber, A. Shultz (IfA, Hawaii), P. M. Garnavich (Notre Dame), S. Margheim (Gemini Observatory), D. Kasen (UCB/LBL), R. Olling, E. Shaya (U Maryland)
on 20 Jun 2017; 12:47 UT
Credential Certification: Brad Tucker (brad@mso.anu.edu.au)

Subjects: Optical, Supernovae

Referred to by ATel #: 10539

We obtained a spectrum of KSN2017B/AT2017ejc/PTSS17syx, a transient discovered in the Kepler K2 Campaign 14 field, on 2017-06-14 using the Wide Field Spectrograph (WiFeS - Dopita et al., 2007, ApSS, 310, 255) on the ANU 2.3m telescope at Siding Spring Observatory near Coonabarabran, NSW, Australia, using the B3000/R3000 gratings (3500-9800 A, 1 A resolution). Classification was performed using SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and the object is well matched to several normal type Ia supernova eight days post-max at a redshift of 0.048 which is consistent with the host redshift. Using the age from the spectrum, K2 observations of the object would have started at -6 days.