AstroNote 2020-50

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2020-02-25 19:32:42
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: M. Amenouche, A. Möller (Clermont-Ferrand), C. R. Angus (DARK), M. Smith, T. Muller Bravo, M. Pursiainen (Southampton), S. C. Williams (Turku), M. Dennefeld (IAP), S. Srivastav (QUB), 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), I. Manulis (Weizmann), 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 (QUB).
Source Group: ePESSTO+
This report includes classifications of 3 Type Ia's (including one 91T-like event) and 1 Type II SN.

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 Pan-STARRS Survey for Transients (Chambers et al. 2016 2016arXiv161205560C), the ATLAS survey (Tonry et al. 2018 2018PASP..130f4505T), 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 Feb 24, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B).

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
TNS2020ckv [ZTF20aamxuwl]11:03:26.485-01:32:26.95SN II0.0369572MFGC 086150.036957ZTF, ATLASAround maxRedshift taken from host galaxy11:03:26.479-01:32:27.05SN II0.037
TNS2020cww [ZTF20aansmsj]13:14:14.855+19:56:39.57SN Ia0.11ZTF, ATLASAround maxRedshift from supernova template fit13:14:14.848+19:56:39.51SN Ia0.11
TNS2020czo [ZTF20aaowuim]11:01:11.302+12:28:29.18SN Ia0.0267ZTF-7d to -10dRedshift from host galaxy emission lines11:01:11.302+12:28:29.18SN Ia0.0267
TNS2020dcp [ZTF20aaosoct]09:53:45.426-04:59:31.83SN Ia-91T-like0.059GALEXASC J095345.47-045929.9;0.059ZTF, ATLAS-5d to -7dRedshift from host galaxy09:53:45.416-04:59:31.67SN Ia-91T-like0.059