Spectral Classification of Gaia16ajv

ATel #8920; A. S. Piascik, I. A. Steele (Liverpool JMU)
on 7 Apr 2016; 11:39 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Iain Steele (iainsteele@mac.com)

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We conducted a spectroscopic observation of transient Gaia16ajv at 2016-04-06T21:04:19 UT. This transient was observed by the Gaia Photometric Science survey at 2016-04-01T14:55:18 UT and position RA=07:42:53.90 DEC=+14:48:04.10

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 good match with SN2005ls at +11 days past maximum with a SNID estimated redshift of z=0.068. The transient is 0.063 arcmin from the proposed host galaxy, 2MASX J07425397+1448004 (no redshift available). Assuming the SNID value of z=0.068, the ejecta velocity estimated from the Si II 635.3nm absorption feature is ~12,000 km/s.

Liverpool Telescope