AstroNote 2020-203

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2020-10-23 15:20:36
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: N. Ihanec, M. Gromadzki (Warsaw), T. Wevers (ESO), M. Fraser (Dublin), S. Benetti (INAF-OAPd), C. Gutierrez (Soton), S. Taubenberger (MPIA), T.-W. Chen (Stockholm), 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+
This report includes classifications of 3 Type Ia's, 1 Type II, and a likely Galactic cataclysmic variable. AT2020xqa shows a blue, featureless continuum and is a possible young core-collapse supernova. Follow-up observations are encouraged to verify this classification.

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

Targets were supplied by the ATLAS survey (Smith et al. 2020 2020arXiv200309052S), the Zwicky Transient Facility ZTF (Bellm et al. 2019 2019PASP..131a8002B) - data stream processed through the Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3a..26S), and the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014 2014ApJ...788...48S)

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2020 October 22, 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) and Superfit (Howell et al. 2005 2005ApJ...634.1190H).

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
TNS2020wfi [ZTF20aciuafo]08:54:30.686+01:26:12.25SN Ia0.115at maxredshift from SNID08:54:30.686+01:26:12.25SN Ia0.115
TNS2020xqb [ATLAS20bdzx]21:45:21.186+02:55:47.94SN Ia0.037at maxredshift from SNID21:45:21.190+02:55:47.96SN Ia0.037
TNS2020vzv [ZTF20acifzof]21:13:24.785+17:40:29.10SN II0.019SDSS J211324.53+174026.60.01+7 to +10redshift from SNID21:13:24.785+17:40:29.10SN II0.019
TNS2020vfi [ZTF20achrklb]23:51:16.024-13:11:29.78SN Ia-91T-like0.07WISEA J235115.87-131127.50.070455-5 to -2redshift from SNID23:51:16.020-13:11:29.75SN Ia-91T-like0.07
TNS2020tyr [ASASSN-20mg]17:38:33.302-48:23:59.82CV0H Balmer absorption lines, Halpha partially filled in17:38:33.302-48:23:59.82CV
TNS2020xqa [ATLAS20bdzt]02:32:55.756+02:24:00.210.066Blue featureless continuum. Possible young core-collapse supernova. Redshift based on single faint feature identified as He I 587.6 nm.02:32:55.761+02:24:00.21Other0.066