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PESSTO spectroscopic classification of optical transient

ATel #8646; A. Cikota (ESO), G. Terreran (QUB, INAF Padova), N. Elias-Rosa (INAF Padova), E. Cappellaro, S. Benetti (INAF Padova), A. De Cia (ESO), C. Inserra (QUB), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann), D. Wright (QUB), K. Chambers, H. Flewelling, M. Huber, E. Magnier, J. Tonry, C. Wate, rs R. J. Wainscoat (IfA, Univ. Hawaii)
on 6 Feb 2016; 16:04 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Enrico Cappellaro (enrico.cappellaro@oapd.inaf.it)

Subjects: Optical, Supernovae

PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see Smartt et al. 2015, A&A, 579, 40 http://www.pessto.org ), reports the following supernova classification. The target was supplied by Pan-STARRS Survey for Transients (see Huber et al., ATel #7153).

Observation was performed on the ESO New Technology Telescope at La Silla on 2016 February 05th, using EFOSC2 and Grism 11 (3360-7460, 14A resolution). Classifications was done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and GELATO (Harutyunyan et al., 2008, A&A, 488, 383).

Classification spectrum and additional details can be obtained from http://www.pessto.org (via WISeREP).

Name      | RA (J2000)  | Dec (J2000) | Disc. Date | Disc. Source |   Mag  |   z   |  Type  |  Phase  | Notes  
SN2016aak | 09:14:13.01 | +16:44:30.2 | 2016-02-03 | PS1          |  18.25 | 0.028 | SNIa   |  ~-10   | a   

a. Discovered originally as PS16adq. Very similar to early SN 2001V spectra (Matheson et al 2008, AJ 135,1598), but with shallower Si-II 635.5nm absorption. A broad feature at 651.4nm is likely C-II 658.0nm. The expansion velocity deduced from the Si-II 635.5nm and C-II 658.0nm absorptions are about 12500km/s and 11800km/s, respectively.