AstroNote 2020-7

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DRAFT
2020-01-05 21:28:26
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Wiseman, M. Grayling, T. Müller Bravo (Southampton), N. Meza (PUC), L. Galbany (UGR), T. Nagao (ESO), M. T. Botticella (INAF), J. Anderson (ESO), T.-W. Chen (Stockholm), M. Gromadzki (Warsaw), 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), I. Manulis (Weizmann)
Source Group: ePESSTO+
Abstract:
This report includes classifications of 1 Type Ia, 1 Type Ic, and an unknown transient. ZTF20aaavvlv displays a blue continuum with a small number of broad features. We encourage followup observations.

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 ATLAS survey (Tonry et al. 2018 2018PASP..130f4505T), and the Zwicky Transient Facility ZTF (Kulkarni 2018 2018ATel11266....1K) - data stream processed through the Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3a..26S).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2020 January 04, 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 astroDASH (Muthukrishna et al. 2019 2019arXiv190302557M).

The classification spectra and additional details can be obtained from http://www.pessto.org (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
TNS2020dr [ATLAS20arp]02:45:18.922-17:42:19.15SN Ic0.0257NGC10990.0257280Redshift from host galaxy02:45:18.878-17:42:18.51SN Ic0.0257
TNS2020ds [ATLAS20aru]00:28:38.801-10:11:21.83SN Ia0.05765-700:28:38.800-10:11:21.80SN Ia0.05765
OtherZTF20aaavvlv09:18:29.700+28:08:29.800.208Redshift from narrow emission line presumed to be H-alpha