Spectroscopic classification of threeI SNe at Asiago
ATel #7787; L. Tomasella, S. Benetti, E. Cappellaro, N. Elias-Rosa, P. Ochner, A. Pastorello, L. Tartaglia, G. Terreran, M. Turatto (INAF OAPd)
on 11 Jul 2015; 14:17 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Enrico Cappellaro (firstname.lastname@example.org)
Subjects: Optical, Supernovae
The Asiago Transient Classification Program (Tomasella et
al. 2014, AN, 335, 841) reports the spectroscopic classification of
ASASSN-15mg (ATel #7780) in 2MASX J15322270+4150586, discovered during
the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN), PSN
J17292918+7542390 in NGC 6412, discovered by Ron Arbour, and PSN
J22460504-1059484 in NGC7371, discovered by Koichi Itagaki.
Informations on these transients are also available from the "Bright
Supernova" website (http://www.rochesterastronomy.org/snimages/) and the
CBAT "Transient Objects Confirmation Page"
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
ASASSN-15mg | 20150710.88 | 0.0428 | Ia | -7d | (1)
PSN J17292918+7542390 | 20150710.97 | 0.0044 | II | early |
PSN J22460504-1059484 | 20150711.07 | 0.0089 | IIb? | max | (2)
(1) The expansion velocity of the ejected material, as inferred from the position of the absorption of the SiII 6355 \AA, is about 15000 km/s.
(2) the red continuum and spectral features are best fitted by the type IIb SN2000H
after maximum. However the spectral classification codes find also good matches both with
differentl type I SNe before maximum.
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.