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Spectroscopic observation of SN2017gkk by NUTS (NOT Un-biased Transient Survey)

ATel #10698; F. Onori (SRON), S. Benetti (INAF-OAPd), E. Cappellaro (INAF-OAPd), Illa R. Losada (SU, Nordita, NOT), E. Gafton (NOT, SU, OKC), on behalf of the NUTS collaboration.
on 2 Sep 2017; 11:07 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Francesca Onori (f.onori@sron.nl)

Subjects: Optical, Supernovae, Transient

The Nordic Optical Telescope (NOT) Unbiased Transient Survey (NUTS; ATel #8992) reports the spectroscopic classification of supernova SN2017gkk (=MASTER OT J091344.71762842.5) in host galaxy NGC 2748. The candidate was discovered by MASTER robotic Net (Atel #10667).

The observation was 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  
AT2017gkk      | SN2017gkk  | 2017-08-19.96       | 14.7          | 2017-09-02 05:36:03 | 0.0049   | IIb  | -11.3d  | (1)  

(1) The spectrum resembles that of a pre-maximum type IIb supernova. Adopting for the host galaxy z = 0.004923 (Kamphuis, J. J. et al., 1996, A&AS, 116, 15 )

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.