Asiago spectroscopic classification of ASASSN-18io

ATel #11555; V. Granata (DFA-UniPd), S. Benetti, L. Tomasella, E. Cappellaro, M. Turatto (INAF-OAPd)
on 21 Apr 2018; 06:41 UT
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)

Tweet

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of ASASSN-18io, discovered during the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014).

The observations were performed with the Asiago 1.82 m Copernico Telescope equipped with AFOSC (range 320-728 nm; resolution 1.4 nm).

 
 
Survey Name   | IAI Name      | Discovery date (UT)  | Discovery mag    | Observation (UT)    |  Type  | z         | Notes| 
ASASSN-18io   | SN2018awn     |  2018-04-20.22       | 16.9             |2018–04-20 19:20:15  |   Ia   | 0.029123  | (1)  | 

(1) The spectrum of ASASSN-18io is consistent with those of Type 91T-like Ia SNe few days before maximum light. The velocity of the ejecta, as measured from SiII 635.5 nm, is about 11500 km/s. The redshift is from SDSS3.

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.