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Spectroscopic observation of the supernova SN2016ios/Gaia16byj by NUTS (NOT Un-biased Transient Survey)

ATel #9834; T. Kangas, S. Mattila (Turku), P. Lundqvist, F. Taddia (Stockholm), E. Kankare (QUB), H. Kuncarayakti, J. Harmanen, T. Reynolds, A. Somero (Turku), M. Ergon (Stockholm), E. Gafton (NOT), on behalf of the NUTS collaboration
on 7 Dec 2016; 14:32 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Tuomas Kangas (tjakan@utu.fi)

Subjects: Optical, Supernovae, Transient

The Nordic Optical Telescope (NOT) Unbiased Transient Survey (NUTS; ATel #8992) reports the spectroscopic classification of the supernova SN2016ios/Gaia16byj in the host galaxy NGC 4484. The candidate was reported on the Gaia Photometric Science Alerts webpage.

The observations were performed with the 2.56 m Nordic Optical Telescope equipped with ALFOSC (range 350-950 nm; resolution 1.6 nm FWHM).

Survey Name    | IAU Name   | Discovery (UT)  | Discovery mag | Observation (UT) | Redshift | Type | Phase   | Notes  
Gaia16byj      | SN2016ios  | 2016-11-25.79   | 18.05         | 2016-12-07.25    | 0.017    | II   | >+40d   | (1)  

(1) The transient matches a type II-P SN during the plateau phase (good matches between 40 -- 100 d). Clear features typical to type II-P, such as a P Cygni profile of H-alpha, the Ca II infrared triplet and Fe absorption lines are visible. The redshift is from the host galaxy.

We acknowledge ESA Gaia, DPAC and the Photometric Science Alerts Team (http://gsaweb.ast.cam.ac.uk/alerts). 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. Calibrated spectra and additional information can be retrieved in the IAU Transient Name Server.