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SALT spectroscopic classification of PS15bzz as a type-Ia supernova at maximum light

ATel #8069; S. W. Jha (Rutgers), Y.-C. Pan, R. J. Foley (Illinois), A. Rest (STScI), D. Scolnic (Chicago/KICP), K. W. Smith, D. Wright, S. J. Smartt (QUB), M. Huber, K. C. Chambers, H. Flewelling, M. Willman, N. Primak, A. Schultz, B. Gibson, E. Magnier, C. Waters, J. Tonry, R. J. Wainscoat (IfA, Hawaii), B. Miszalski (SALT/SAAO)
on 18 Sep 2015; 22:04 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Saurabh Jha (saurabh@physics.rutgers.edu)

Subjects: Supernovae

We obtained SALT (+RSS) spectroscopy of PS15bzz on 2015 Aug 16.9 UT, covering the wavelength range 360-820 nm. Cross-correlation of the spectrum with a template library using SNID (Blondin & Tonry 2007, ApJ, 666, 1024) shows PS15bzz is a type-Ia supernova within a few days of maximum light. Adopting the SDSS DR12 (Alam et al. 2015, ApJS, 219, 12) redshift of the host galaxy, z = 0.0802, the expansion velocity of the supernova measured by the trough of the Si II (rest 635.5 nm) line is 11,200 km/s.

PS15bzz 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/