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Spectroscopic classification of Gaia18adv by NUTS (NOT Un-biased Transient Survey)

ATel #11206; C. Gall (DARK, KU), S. Benetti (Padova), L. Wyrzykowski(Warsaw), M. Stritzinger (Aarhus U), S. Holmbo (Aarhus U), S. Dong (KIAA-PKU) and Lauri Siltala (NOT observer) on behalf of the NUTS collaboration.
on 20 Jan 2018; 14:22 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Christa Gall (christa@dark-cosmology.dk)

Subjects: Optical, Supernovae, Transient

The Nordic Optical Telescope (NOT) Unbiased Transient Survey (NUTS; ATel #8992) collaboration reports the spectroscopic classification of Gaia18adv (SN2018hh) near the host galaxy SDSS J121341.37+282640.0. The candidate was discovered by the Gaia Photometric Science survey at G-Gaia = 18.97 mag on UT 2018-01-14.37. The object had not been detected in G-Gaia images taken on 2017-12-25.19 and before.

The observation was performed with the 2.56 m Nordic Optical Telescope equipped with ALFOSC on 2018-01-20.08 UT (range 350-950 nm; resolution 1.6 nm).

Name         |  IAU Name   |  Redshift |  Discovery (UT) |  Discovery mag  |  Type   | Phase           | Notes 
Gaia18adv    |  SN 2018hh  |  0.10     |  2018-01-14.37  |  18.97          | Ia-norm | around maximum  | (1) 

(1) Good matches are obtained using SNID and GELATO with spectra of the Type Ia-norm SNe 2006ax, 2007A and 1998bu obtained some days around maximum. The redshift is based on SNID.

Classification was performed using both the SNID (Blondin and Tonry 2007, ApJ, 666, 1024) and GELATO tools.