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Spectroscopic classification of SNhunt168

ATel #4772; P. Ochner (Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica - OAPd-INAF), N. Blagorodnova (Institute of Astronomy, University of Cambridge), L. Tomasella, S. Benetti, E. Cappellaro, A. Pastorello, M. Turatto (OAPd-INAF)
on 31 Jan 2013; 01:29 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)

Subjects: Optical, Supernovae, Transient

We report that optical spectroscopy (range 340-800 nm; resolution 0.7 nm), obtained on Jan. 29.86 UT with the Asiago 1.22-m Galileo Telescope (+ Boller & Chivens spectrograph), shows that PSN J09133717+2959587 (SNhunt168) is most likely a type-Ic supernova. Adopting for the host galaxy (MCG +5-22-20) the redshift z = 0.024537 (Mahdavi & Geller 2004, ApJ 607, 202; via NED), the best match is with the type-Ic SN 2004aw (Taubenberger et al 2006, MNRAS 371, 1459) around maximum light. The SN spectrum show very intense NaID interstellar absorption (EW about 0.31 nm) which may suggest a significant reddening in the host galaxy and would make for a very bright event. When this high reddening is taken into account, the best match is obtained with spectra of the type IIb SN 1993J (Barbon et al 1995, A&AS 110, 513) at maximum light. The Asiago classification spectra are posted at website URL http://graspa.oapd.inaf.it ; classification was made via GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry 2007, Ap.J. 666, 1024).