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Spectroscopic classification of AT2017ffk as a Type II Supernova

ATel #10744; Osmar Rodriguez, Giuliano Pignata (Universidad Andres Bello/MAS)
on 14 Sep 2017; 07:18 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Giuliano Pignata (pignago@gmail.com)

Subjects: Optical, Supernovae

We obtained an optical spectrum (500-900nm) of AT2017ffk on 2017 Sept 12.01 UT with the Goodman spectrograph, mounted on the SOAR telescope. Using the SNID code (Blondin & Tonry, 2007, ApJ, 666, 1024) we find a good match with a Type II supernova at more than two months after the explosion at z=0.015, consistent with the redshift of its host galaxy IC 991. From the FeII absorption minima we estimate an expansion velocity of about 3300 km/s.