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Spectroscopic classification of Gaia17aqn by NUTS (NOT Un-biased Transient Survey)

ATel #10213; T. Reynolds (NOT, Turku), S. Mattila, H. Kuncarayakti, T. Kangas, J. Harmanen (Turku), A. Somero (MAGIC, Turku), P. Lundqvist, F. Taddia, M. Ergon (Stockholm),
on 26 Mar 2017; 17:00 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Thomas Reynolds (treynolds1729@gmail.com)

Subjects: Optical, Supernovae, Transient

The Nordic Optical Telescope (NOT) Unbiased Transient Survey (NUTS; ATel #8992) reports the spectroscopic classification of Gaia17aqn in host galaxy SDSS J022723.27+251632.5. The candidate was discovered by the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts) and by the ATLAS survey (as ATLAS17bdu), see Tonry et al.

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  
Gaia17aqn      | SN2016bem  | 2017-02-18.00   | 18.7          | 2017-03-25.84    | 0.062    | Ia   | +40d    | (1)  

(1) Best fit to normal SN Ia 1997bq at +41d. Several other good fits to SNe Ia 30-40 days post peak. Redshift was derived from SN features.

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.