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Classification of PSN J20065788-5625312 as a Type Ia SN near max with WiFeS

ATel #5239; M. Childress, R. Scalzo, F. Yuan, B. Schmidt (Australian National University), B. Tucker (ANU, UC Berkeley)
on 31 Jul 2013; 16:21 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Michael Childress (mjc@mso.anu.edu.au)

Subjects: Optical, Supernovae

We report spectroscopic classification of PSN J20065788-5625312 as a SN Ia near max based on a 40 minute spectrum obtained with the Wide Field Spectrograph (WiFeS - Dopita et al., 2007, ApSS, 310, 255) on the ANU 2.3m telescope at Siding Spring Observatory, NSW Australia, using the B3000/R3000 gratings (3500-9800 A, 1 A resolution). PSN J20065788-5625312 was discovered by Peter Marples and Greg Bock on 2013 July 31.51 at 17.4 mag, and our spectrum with WiFeS on 2013 July 31.64 indicates it is a Type Ia around maximum light. Classification with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) shows best match to SN 1994D at -2 days at a redshift of 0.050 +- 0.006, consistent with the redshift of the apparent host galaxy 2MASX J20065644-5625175 (z=0.051946, Jones et al., 2009, MNRAS, 399, 683). Clear SN Ia signatures include Si II 6355 at a rest frame velocity of 12,000 km/s (using host redshift), Si II 5972, the S II "W", O I 7700, Ca H/K, and the Ca II NIR triplet.

 
 Name                   | RA (J2000)   | Dec (J2000)  | Disc. Date | Disc. Source    | Disc Mag  |   z   |  Type |  Phase       | Notes 
 PSN J20065788-5625312  | 20 06 57.88  | -56 25 31.2  |  20130731  | Marples, Bock   |    17.4   | 0.050 |  Ia   |  -2          |