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Classification of MASTER OT J041227.87+342902.0 as Type Ia Supernova

ATel #8138; A. S. Piascik, I. A. Steele (Liverpool JMU)
on 7 Oct 2015; 10:41 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Iain Steele (iainsteele@mac.com)

Subjects: Optical, Supernovae

We conducted a spectroscopic observation of transient MASTER OT J041227.87+342902.0 at 2015-10-07T02:52:17.75 UT.

This transient was reported by the MASTER-Kislovodsk auto-detection system (Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010) in ATel #8128.

A spectrum was obtain in the visible, 400-800nm, with resolution R ~350, using the SPRAT spectrograph on the Liverpool Telescope located at Roque de los Muchachos.

Classification using SNID (Blondin and Tonry 2007, ApJ, 666, 1024) indicates it is a type Ia supernova. We find a close match with SN2005am at +12 days post-maximum. The SNID estimated red shift is z = 0.023, consistent with that of the proposed host galaxy PGC097035, z = 0.021. The velocity of ejecta estimated from the Si II absorption feature at 635.5 nm is ~10,600 k

Liverpool Telescope