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Asiago spectroscopic classification of SN 2017ets

ATel #10512; L. Tomasella, S. Benetti, E. Cappellaro (INAF-OAPd)
on 20 Jun 2017; 09:37 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)

Subjects: Optical, Supernovae

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of ATLAS17hca (SN 2017ets).

The observation was performed with the Asiago 1.82 m Copernico Telescope equipped with AFOSC (range 340-820 nm; resolution 1.4 nm).

 
Survey Name |  IAU Name   |      Host galaxy       |  Discovery (UT)   | Discovery mag | Observation (UT) |  Redshift | Type   |  Phase       | Notes  
ATLAS17hca  | SN 2017ets  |SDSS J161346.03+225508.3|2017-06-16         |     17.99     | 2017-06-20.06    |    0.032  | SN Ia  |  before max  | (1) 

(1) The best match is with Type Ia supernovae about one week before maximum light. Using the redshift 0.032 (SDSS DR13), from the position of the minimum of the Si II 635nm feature, we infer an expansion velocity of ~11100 km/s for the ejected material.

The classification was performed using the GELATO (Harutyunyan et al. 2008, A&A, 488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024) tools. The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it.