Classification of ASASSN-16ct as a Type Ia supernova near maximum
ATel #8798; A. S. Piascik, I. A. Steele (Liverpool JMU)
on 10 Mar 2016; 10:33 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Iain Steele (firstname.lastname@example.org)
Subjects: Supernovae, Transient
We conducted a spectroscopic observation of transient ASASSN-16ct (AT 2016aud) at 2016-03-10T04:38:37 UT. This transient was identified in ATel #8796 by the All Sky Automated Survey for SuperNovae (ASAS-SN).
A spectrum was obtained in the visible, 400-800nm, with resolution R~350, using the SPRAT spectrograph on the Liverpool Telescope located at Roque de los Muchachos, La Palma.
Classification with SNID (Blondin and Tonry 2007, ApJ, 666, 1024) indicates it is a type Ia SN, with subtype Ia-91T. We find a good match with SN2007S at a -4 days with and estimated redshift of z=0.044, comparable with that of the proposed host galaxy SDSS J151354.30+044525.7, z=0.042.
The ejecta velocity estimated from the Si II absorption feature at 635.5 nm is ~10000 km/s.