AstroNote 2020-39

Primary tabs

2020-02-13 16:10:16
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: M. Smith (Southampton), A. Möller, M. Amenouche (Clermont-Ferrand), C. Angus (DARK), M. Pursiainen (Southampton), P. Pessi (CONICET), G. Pignata (UNAB/MAS), P.Wiseman (Southampton), S. Prentice (TCD), J. Anderson (ESO), T. Muller Bravo (Southampton), 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, S. Srivastav (QUB)
Source Group: ePESSTO+
This report includes classifications of one Type Ia, one Type II, one Type IIb and one unclassified target.

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 Feb 12, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) 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
TNS2020bdh [ZTF20aaivtof]02:48:18.498-09:26:52.86Other0.035WISEA J024818.20-092651.90.035Redshift is estimated from host galaxy lines visible in the spectrum. The spectrum shows broad emission feature around Halpha line.02:48:18.498-09:26:52.860.035
TNS2020cbo [ATLAS20fns]14:20:33.223-33:19:43.05SN Ia0.04–7 to –4Redshift from SNID fit14:20:33.223-33:19:43.05SN Ia0.04
TNS2020bft [ATLAS20ehk]15:12:38.462-32:12:35.19SN IIb0.03post-maxRedshift from SNID fit15:12:38.462-32:12:35.19SN IIb0.03
TNS2020chy [ZTF20aamamnp]08:58:28.875+00:52:28.63SN II0.05pre-maxRedshift from SNID fit08:58:28.874+00:52:28.57SN II0.05