AstroNote 2020-236

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2020-11-23 17:11:29
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: Nada Ihanec, Mariusz Gromadzki (Warsaw), Seán Brennan, Morgan Fraser (UCD), Roberta Carini (INAF), Giuliano Pignata (UNAB), Phil Wiseman (Southampton) , J. Anderson (ESO), T. Muller Bravo (Southampton), T.-W. Chen (Stockholm), 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, S. Srivastav (QUB)
Source Group: ePESSTO+
This classification includes the report of 2 Type Ia's and 1 Galaxy. ZTF20acqyfdh shows a spectrum that is relatively blue, and shows narrow (unresolved) emission lines that are likely from the host (Halpha, S II at 6716, 6732 Ang).

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, see Smith et al. (2020, PASP, arXiv:2003.09052) and 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).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2020 November 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
TNS2020aaqh [ATLAS20bfyq]03:08:12.242-11:43:53.79SN Ia0.08+4 to +7Redshift from SNID03:08:12.250-11:43:53.80SN Ia0.08
TNS2020zhb [ATLAS20bfik]05:28:45.106-33:54:52.87SN Ia0.08At maxRedshift from SNID05:28:45.106-33:54:52.87SN Ia0.08
OtherZTF20acqyfdh03:09:19.681-10:31:27.44Galaxy0.095Redshifted measured from narrow emission lines.