SALT spectroscopic classification of PS16efm (= SN 2016fxu) as a type-Ic supernova after maximum light
ATel #9473; S. W. Jha, K. Dettman (Rutgers), Y.-C. Pan, R. J. Foley (UCSC), A. Rest (STScI), D. Scolnic (Chicago/KICP), M. Kotze (SAAO/SALT)
on 8 Sep 2016; 12:51 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 PS16efm (= SN 2016fxu) on 2016 Sep 8.0 UT, covering the wavelength range 350-920 nm. Cross-correlation of the spectrum with a template library using SNID (Blondin & Tonry 2007, ApJ, 666, 1024) shows PS16efm is a type-Ic supernova approximately two to three weeks past maximum light. A good
SNID match is obtained with SN 2004aw at +23 days, with some broad-lined SN Ic also showing reasonable matches at somewhat sooner after maximum. SNID matches to post-maximum SN Ia spectra are not as compelling. Numerous superimposed narrow emission lines confirm the redshift of the host galaxy UGC 1365 at z = 0.016 (Huchra, Vogeley, &
Geller 1999, ApJS, 121, 287; via NED).
Our spectrum is posted on the Transient Name Server
SN 2016xfu page.
PS16efm was discovered as part of the Pan-STARRS Survey for Transients (Huber et al. 2015, ATel
#7153). Information on all PSST objects is available at http://star.pst.qub.ac.uk/ps1threepi/