AstroNote 2020-209

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2020-10-26 16:10:46
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients - SN2019yxk
Authors: N. Ihanec,M. Gromadzki (Warsaw), T. Wevers (ESO), C. Gutierrez (Turku), S. Taubenberger (MPA Garching), T.-W. Chen (Stockholm), S. Benetti (INAF-OAPd), M. Fraser (Dublin), S. Schulze (Weizmann), J. Anderson (ESO), T. Muller Bravo (Southampton), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron (Weizmann), D. Young (QUB), J. Tonry, L. Denneau, A. Heinze, H. Weiland, H. Flewelling (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith, S. J. Smartt, O. McBrien, S. Srivastav (QUB)
Source Group: ePESSTO+
We report on a spectrum of SN2019yxk, a transient showing a very long-lived plateau phase. The spectral signatures suggest a SN IIn classification. Strong H-alpha and H-beta, purely in emission, are observed. The continuum shape, equivalent widths of these 2 emission lines and the line profile widths are almost identical to SN2010jl at a phase of +206 days (matched in Gelato).

ePESSTO+, the advanced Public ESO Spectroscopic Survey for Transient Objects (Smartt et al. 2015 2015A&A...579A..40S), reports the following supernova classifications.

Targets were supplied by the the ATLAS survey (Smith et al. 2020 2020arXiv200309052S) - see Astronote 2020-208.

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2020 October 25, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) and GELATO (Harutyunyan et al. 2008 2008A&A...488..383H).

The classification spectra and additional details can be obtained from (via WISeREP) and the IAU Transient Name Server.

The classified objects are listed in the Related Objects table below.

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftSourcePhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2019yxk [ATLAS19bepo]04:13:46.311-22:26:06.60SN IIn0.094206redshift from narrow SN emission lines04:13:46.314-22:26:06.65SN IIn0.094