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Asiago classification of PS1-14xz in NGC4258

ATel #6160; P. Ochner, L. Tomasella, S. Benetti, A. Pastorello, N. Elias-Rosa, E. Cappellaro, M. Turatto (INAF Osservatorio Astronomico di Padova)
on 21 May 2014; 23:35 UT
Credential Certification: Enrico Cappellaro (enrico.cappellaro@oapd.inaf.it)

Subjects: Supernovae

A low S/N optical spectrogram (range 335-785 nm; resolution 0.9 nm), obtained on May 21.82 UT with the Asiago 1.22-m Galileo Telescope (+ Boller & Chivens spectrograph) shows that PS1-14xz (cfr. ATEL #6156) is an evolved type II supernova. The spectrum shows a red continuum with over-imposed H-alpha and H-beta lines with P-Cygni profiles. From the shallow H-alpha absorption, and assuming a recession velocity of 448 km/s for the host galaxy, M106 (RC3; via NED), an expansion velocity of about 3700 km/s is deduced. A strong NaI-D interstellar absorption suggests the presence of significant extinction. The Asiago classification spectra are posted at website URL http://sngroup.oapd.inaf.it.