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Classification of Gaia16acv as a Type Ia supernova near maximum light

ATel #8683; A. S. Piascik, I. A. Steele (Liverpool JMU)
on 12 Feb 2016; 16:02 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 Gaia16acv at 2016-02-11T23:34:08 UT. This transient was detected by the Gaia Photometric Science survey on 2016-02-08T11:35:08 UT at position RA=11:59:49.80, DEC=54:48:07.60.

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 SN2003du at -1 days with an estimated red-shift of z=0.077.

The nearest galaxy is SDSS J115949.80+544807.1 (NED) at a separation of 0.01 arcmin, no red-shift available. Assuming the SNID red-shift, the velocity of the ejecta from the Si II absorption feature at 635.5 nm is estimated to be ~11,100 km/s.

Liverpool Telescope