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Spectroscopic classification of PSN J20150317-1959462 (SNhunt291) with the Nordic Optical Telescope

ATel #7951; Stan Howerton (Arkansas City, KS, USA), Andreas Kvammen, Jussi Harmanen (Nordic Optical Telescope, Spain), Nancy Elias-Rosa, Andrea Pastorello, S. Benetti, E. Cappellaro, P. Ochner, L. Tartaglia, G. Terreran, L. Tomasella, M. Turatto, (Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica)
on 26 Aug 2015; 09:16 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: N. Elias-Rosa (nancy.elias@oapd.inaf.it)

Subjects: Optical, Supernovae

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of PSN J20150317-1959462 (= SNhunt291) in the galaxy ESO 596-G10, discovered by S. Howerton. Information on this transient are available in the Supernova Hunt discovery pages of the Catalina Real-Time TRansient Survey (CRTS; http://nesssi.cacr.caltech.edu/catalina/current.html ), the "Bright Supernova" website (http://www.rochesterastronomy.org/snimages/) and the CBAT Transient Object Followup Reports (http://www.cbat.eps.harvard.edu/index.html). The observation was performed with the 2.56-m Nordic Optical Telescope (+ ALFOSC; range 345-905 nm; resolution 1.4 nm).

Name           | Discovery     | z        | Type     | Observation date | Phase    | Notes  
SNhunt291 | 2015-07-08.34 | 0.0163 | II-P | 2015-08-13.25.03 | ~50 days | (1)

(1) The spectrum shows P-Cygni lines of H, Ca II, Na I, Fe II, Ti II, and Sc II, usually observed in Type II SNe during the H recombination phase. The expansion velocity of the ejecta, as obtained from the position of the minimum of Halpha, is about about 7000 km/s. Photometric follow-up suggests that this is a type II-P event.

The classification was done with GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024). The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it.