Spectroscopic classification of Gaia 16bjx (= SN 2016gok) with the Nordic Optical Telescope

ATel #9580; A. Pastorello (INAF-Padova), S. Mattila (Turku), N. Elias-Rosa (INAF-Padova), P. Lundqvist (Stockholm), M. Stritzinger (Aarhus U), J. Harmanen (Turku), T. Reynolds (Turku, NOT), S. Benetti (INAF-Padova), E. Cappellaro (INAF-Padova), N. Blagorodnova (Caltech), S. Davis (FSU), S. Dong (KIAA-PKU), M. Fraser (IoA), C. Gall (Aarhus U), D. Harrison (IoA), S. Hodgkin (IoA), E. Y. Hsiao (FSU), P. Jonker (SRON), T. Kangas (Turku), E. Kankare (QUB), Z. Kostrzewa-Rutkowska (Warsaw/SRON), H. Kuncarayakti (MAS, DAS), M. Nielsen (Aarhus U), P. Ochner (INAF-Padova), J. L. Prieto (UDP, MAS), C. Romero-Canizales (UDP, MAS), F. Taddia (OKC), L. Tartaglia (INAF-Padova), G. Terreran (INAF-Padova/QUB), L. Tomasella (INAF-Padova), L. Wyrzykowski (Warsaw Observatory)
on 1 Oct 2016; 12:26 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Enrico Cappellaro (enrico.cappellaro@oapd.inaf.it)

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The NOT Unbiased Transient Survey (NUTS) reports the spectroscopic classification of supernova AT 2016gok in host galaxy SDSS J143241.36+520452.1. The candidate has been discovered by the Gaia Photometric Science Alerts program.

The observations were performed with the 2.56 m Nordic Optical Telescope equipped with ALFOSC (range 350-950 nm; resolution 0.34 nm) on 2016-09-30.86 UT.

 
Name            |   Host galaxy                   |   Redshift   |  Discovery (UT) |  Discovery mag |  Type    | Phase                       | Notes  
Gaia 16bjx      |   SDSS J143241.36+520452.1      |   0.086      | 2016-09-23.77   | 18.82          |   Ia     |  a few days after maximum   | (1)  

(1) = SN 2016gok. An excellent match is obtained with the normal Type Ia SN 1994ae about 3 days after the B-band maximum. The expansion velocity of the ejecta, as estimated from the position of the Si II 635.5 nm line, is about 10800 km/s. The redshift of the host galaxy has been obtained from the best match of the SN spectral features with the reference template.

Classifications were performed using the GELATO (Harutyunyan et al. 2008, A&A, 488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024) tools, and are posted on WISeREP (Yaron & Gal-Yam 2012, PASP, 124, 668). We acknowledge ESA Gaia (http://cosmos.esa.int/gaia), and the DPAC Photometric Science Alerts Team (http://gsaweb.ast.cam.ac.uk/alerts/alertsindex) (Rixon et al, 2014, ATel #6593).