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Spectroscopic classification of supernova SN 2018Z by NUTS (NOT Un-biased Transient Survey)

ATel #11153; H. Kuncarayakti, S. Mattila, R. Kotak, J. Harmanen, T. Reynolds (Turku), A. Pastorello, S. Benetti (Padua), M. Stritzinger (Aarhus), F. Onori (SRON), A. Somero (MAGIC/Turku), T. Kangas (STScI), P. Lundqvist, F. Taddia, M. Ergon (Stockholm), on behalf of NUTS collaboration
on 10 Jan 2018; 12:56 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Hanindyo Kuncarayakti (kuncarayakti@gmail.com)

Subjects: Optical, Supernovae, Transient

The NOT Unbiased Transient Survey (NUTS; ATel #8992) collaboration reports the spectroscopic classification of supernova SN 2018Z in host galaxy SDSS J231809.76+212553.5

The observations were performed with the 2.56 m Nordic Optical Telescope equipped with ALFOSC (range 350-950 nm; resolution 1.6 nm) on 2018-01-09.9 UT.

Survey Name | IAU Name   | Discovery (UT) | Discovery mag | Observation (UT) | Redshift | Type | Phase         | Notes  
PS18ao      | SN 2018Z   | 2018-01-01.2   | 19.96         | 2018-01-09.9     | 0.102    | Ia   | post-maximum? | (1)  

(1) Redshift was derived from the SN and host absorption features. The spectrum is contaminated by the host galaxy and likely affected by extinction, but bears similarities to several type-Ia SNe well past maximum light.

Classifications were 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.