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 (firstname.lastname@example.org)
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.