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Classification of ASASSN-16cm as a Type Ia supernova near maximum

ATel #8794; A. S. Piascik, I. A. Steele (Liverpool JMU)
on 9 Mar 2016; 19:03 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Iain Steele (iainsteele@mac.com)

Subjects: Optical, Supernovae, Transient

We conducted a spectroscopic observation of transient ASASSN-16cm (AT 2016arq) at 2016-03-08T04:58:32 UT. This transient was identified in ATel #8775 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. We find a good match with SN2006X at a +1 day with and estimated redshift of z=0.031, comparable with that of the proposed host galaxy 2MASX J15192684-0055256, z=0.029722.

The ejecta velocity estimated from the Si II absorption feature at 635.5 nm is ~15000 km/s.

Liverpool Telescope