AstroNote 2019-61

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DRAFT
2019-08-02 15:27:13
Type: Object/s-Discovery/Classification
Classification of three type Ia SNe using the multispectral VPHG GRIS-U for DOLORES@TNG
Authors: S. Benetti, L. Tomasella, I. Salmaso, E. Cappellaro, M. Turatto (INAF - Osservatorio Astronomico di Padova), A. Bianco, A. Zanutta, M. Landoni (INAF - Osservatorio Astronomico di Brera), V. Lorenzi, L. Di Fabrizio, A. Magazzu, E. Poretti (Telescopio Nazionale Galileo, TNG)
Source Group: Padova-Asiago
Abstract:
We report the spectroscopic classifications of ASAS-SN19sv (SN2019lyb), ATLAS19qee (SN2019lwe) and ZTF19abimlck (SN2019lvf) as type Ia SNe.

We report the spectroscopic observations of  ASAS-SN19sv (SN2019lyb), ATLAS19qee (SN2019lwe) and ZTF19abimlck (SN2019lvf),  under the TNG AT39DDT3 program and the Asiago Transient Classification Program (Tomasella et al. 2014). The targets were supplied by the All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014), ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680) and the Zwicky Transient Facility survey (ZTF; https://www.ztf.caltech.edu/; Kulkarni et al. 2018, ATel 11266).

The observations were performed with the 3.6m Italian TNG telescope (Canary Islands, Spain), equipped with the DOLORES camera using the multispectral VPHG GRIS-U (wavelength range: 1st order from 500 to 1000 nm, resolution 1.7 nm; 2nd order from 350 to 515 nm; resolution 0.9 nm).

The classification was performed using the GELATO (Harutyunyan et al. 2008, A&A, 488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024) tools. The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it. 

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2019lyb [ASASSN-19sv]15:11:03.356+52:03:00.59SN Ia0.036876CGCG 274-0310.036876The spectrum is similar to several type Ia SNe few days before maximum light (in agreement with classification of ZTF collaboration reported in TNS, Dugas et al.). Redshift of the host galaxy is from Falco et al. 1999 (PASP 111, 438 via NED). Using this redshift, an expansion velocity of about 11700 km/s is derived from the SiII 635.5 nm minimum.15:11:03.356+52:03:00.59SN Ia0.03692
TNS2019lwe [ATLAS19qee]15:59:31.468+43:25:46.54SN Ia0.045SDSS J155931.36 +432546.9Best matches with type Ia SNe around one week before maximum light (in agreement with classification of ZTF collaboration reported in TNS, Dahiwale et al.). The redshift z=0.045 is derived from SNID/GELATO SN template fitting. Using this redshift, an expansion velocity of about 12300 km/s is derived from the SiII 635.5 nm minimum.15:59:31.460+43:25:46.63SN Ia0.038
TNS2019lvf [ZTF19abimlck]23:04:18.422+46:32:10.03SN Ia0.048083PGC 0703880.048083The spectrum is similar to type Ia SNe few days before maximum light (in agreement with classification of ZTF collaboration reported in TNS, Dahiwale et al.). Redshift of the host galaxy is from Huchra et al. 2012 (ApJS 199, 26 via NED). Using this redshift, an expansion velocity of about 11800 km/s is derived from the SiII 635.5 nm minimum.23:04:18.422+46:32:10.03SN Ia0.048083