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Asiago classification of PS15mb and ASASSN-15ed

ATel #7219; U. Noebauer, E. Ishida, S. Taubenberger (MPA Garching), L. Tomasella, P. Ochner, S. Benetti, E. Cappellaro, N. Elias-Rosa, A. Pastorello, L. Tartaglia, G. Terreran, M. Turatto (INAF OAPd)
on 13 Mar 2015; 16:08 UT
Credential Certification: Lina Tomasella (lina.tomasella@oapd.inaf.it)

Subjects: Optical, Supernovae

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of the following transients. The observations were performed with the Asiago 1.82 m Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.4 nm).

 
Name                  | Date (UT)    |  z       |   Type      | Phase  |  Notes        
PS15mb                | 20150312.98  |  0.029   |    Ia       | at max |   
ASASSN-15ed           | 20150313.15  |  0.049   |    Ibn      | young  |  (1) 
 

(1) The spectrum shows a blue continuum with some broad undulations below 550 nm, and with narrow (velocity ~1350 km/s) P-Cygni lines of He I 4471, 5876, 6678 and 7065 superimposed, suggesting a Type Ibn classification (Pastorello et al. 2008, MNRAS, 389, 113). The redshift estimated from these narrow P-Cygni features agrees with that determined from Halpha, Na I D and Ca II H&K absorption lines in the core of the host galaxy. From the apparent magnitude of V = 17.1 on 2015 March 1.59 (ATel #7163), we estimate an absolute magnitude MV = −19.5 mag.

Classification was done with GELATO (Harutyunyan et al. 2008, A&A, 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.

Padova Asiago SN group