Spectroscopic Classifications of Optical Transients with SOAR

ATel #7832; R. J. Foley, R. A. Hounsell, S. Downing, Y.-C. Pan (Illinois), D. Scolnic (Chicago/KICP), S. W. Jha (Rutgers), A. Rest (STScI), K. W. Smith, D. Wright, S. J. Smartt (QUB), M. Huber, K. C. Chambers, H. Flewelling, M. Willman, N. Primak, A. Schultz, B. Gibson, E. Magnier, C. Waters, J. Tonry, R. J. Wainscoat (IfA, Hawaii)
on 24 Jul 2015; 11:42 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (rfoley@illinois.edu)

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We report the following classifications of optical transients from spectroscopic observations with the Goodman spectrograph (wavelength range 3100 - 7100) on the Southern Astrophysical Research (SOAR) telescope. Targets were supplied by the Pan-STARRS Survey for Transients (PSST) and the THU-NAOC Transient Survey (TNTS). All observations were made on 2015 July 24 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name                   | RA (J2000)  | Dec (J2000) |  z    | Type | Phase |  Notes
 
PSN J16020770+1753549  | 16:02:07.70 | +17:53:54.9 | 0.045 | II   | +10d  | (1) 
PS15bbn                | 21:03:57.51 | +13:22:06.1 | 0.037 | Ia   | +14d  |  
PS15bgo                | 21:53:37.79 | +04:09:59.4 | 0.104 |      |       | (2) 
PS15bhh                | 20:53:04.06 | -19:36:52.2 | 0.15  | Ia   | +0d   | (3) 
PS15bhi                | 21:05:57.59 | -10:42:39.2 | 0.027 | Ib   | +0d   | 
PS15bhj                | 21:45:32.66 | -13:54:44.5 | 0.14  | Ia   | +10d  | (4) 
PS15bhm                | 21:51:00.43 | -22:17:55.9 | 0.131 | Ia   | +10d  | (5) 
PS15bhs                | 22:07:32.50 | +04:15:35.1 | 0.06  | Ia   | +90d  |  
PS15bif                | 20:20:17.77 | -23:44:36.7 | 0.079 | Ia   | -4d   | (6) 

Notes: When the redshift is given to 2 decimal places, it is derived from the SN spectrum. Otherwise, the redshift is determined from the host galaxy. (1) We measure a H-alpha velocity of -9,600 km/s. (2) Relatively low S/N spectrum, but no strong features are visible. (3) We measure a Si II 6355 velocity of -11,400 km/s. (4) We measure a Si II 6355 velocity of -12,300 km/s. (5) We measure a Si II 6355 velocity of -10,200 km/s. (6) 91T-like SN Ia. We measure a Si II 6355 velocity of -11,400 km/s.