[ Previous | Next | ADS ]

Asiago spectroscopic classification of four supernovae

ATel #6290; L. Tomasella, P. Ochner, S. Benetti, E. Cappellaro, A. Pastorello , N. Elias-Rosa, L. Tartaglia and M. Turatto (INAF, Osservatorio Astronomico di Padova)
on 4 Jul 2014; 10:54 UT
Credential Certification: Enrico Cappellaro (enrico.cappellaro@oapd.inaf.it)

Subjects: Optical, Supernovae, Transient

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, in press, http://arxiv.org/abs/1403.7233 ) reports the spectroscopic classification of four SNe. Targets were supplied by Catalina Real-time Transient Survey (http://crts.caltech.edu/); All Sky Automated Survey for SuperNovae (http://www.astronomy.ohio-state.edu/~assassin/) and the IAU Transient Objects Confirmation Page list (http://www.cbat.eps.harvard.edu/unconf/tocp.html). The observations were performed with the Asiago 1.22-m Galileo Telescope (+ Boller & Chivens spectrograph; range 340-800 nm; resolution 1.1 nm), and with the Asiago 1.82 m Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.3 nm).

 
Name                      |    Date (UT)  |     z/v    | Type    | Phase  | Notes 
ASASSN-14de               | 20140703.87   | 8779 km/s  | Ic      |  max   | As1.22m (1) 
CSS140628:164427+285658   | 20140703.94   |   0.058    | Ia      | +3d    | As1.82m  (2) 
PSN J22453888+7309427     | 20140703.98   | 1490 km/s  | Ia-pec  |  max   | As1.82m (3) 
CSS140628:233025+060302   | 20140704.02   |   0.056    | Ia      |  +7 d  | As1.82m (4) 

(1) The recessional velocity is from Karachentsev et al. 1985, Inform. CDS. 29, 87; similar to type-Ic supernova 1994I (Wheeler et al. 1994, ApJ, 436L, 135)
(2) The expansion velocity deduced from the Si II 635-nm absorption is ~11300 km/s
(3) The recessional velocity is from Falco et al. 2000, The Updated Zwicky Catalog. The spectrum resembles those of SN 2008ha (Valenti et al. 2009, Nature, 459,674) and SN2010ae (Strinztinger et al. 2014, A&A, 561, 146)
(4) The expansion velocity deduced from the Si II 635-nm absorption is ~9800 km/s

Classifications were 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.