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CSS130205:124954+062041 was a very young type-II supernova

ATel #4884; A. Pastorello, L. Tartaglia, S. Benetti, E. Cappellaro, P. Ochner, L. Tomasella, M. Turatto (Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica), and N. Blagorodnova (Institute of Astronomy, University of Cambridge)
on 13 Mar 2013; 15:16 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)

Subjects: Optical, Supernovae, Transient

We report that low signal-to-noise optical spectroscopy of CSS130205:124954+062041 (range 370-820 nm; resolution 1.4 nm), obtained on Feb. 9.19 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC), indicates that it was a very young type-II supernova. A blue, almost featureless continuum is seen. The only feature clearly detected is identified with a relatively broad H-alpha. From the position of the Halpha line peak, a redshift z of about 0.014 is derived for the parent galaxy. The Asiago classification spectra are posted at the following 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).