AstroNote 2020-54

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2020-02-28 18:04:06
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: A. Möller, M. Amenouche (Clermont-Ferrand), M. Pursiainen, T. Muller Bravo, M. Smith (Southampton), C. R. Angus (DARK), S. Srivastav (QUB), S. C. Williams (Turku), M. Dennefeld (IAP), 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 1 Type Ia, 1 Type Ic and 1 Type II.

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), 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), and by the ESA Gaia Photometric Science Alerts Team DPAC.

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2020 Feb 27, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B), 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
TNS2020dbn [ZTF20aaqbach]12:28:08.674+20:10:41.39SN II0.023LSBC F574-030.022606ATLAS, ZTFAround max12:28:08.662+20:10:41.46SN II0.023
TNS2020dny [ATLAS20hai]13:25:52.551-17:20:10.17SN Ia0.1ATLAS-8 to -5dRedshift taken from SN template fits13:25:52.551-17:20:10.17SN Ia0.1
TNS2020byp [ZTF20aamdyln]16:09:19.640+15:49:20.24SN Ic0.04SDSS J160919.57+154920.70.041ZTF, GAIAat maxRedshift taken from SN template fits16:09:19.640+15:49:20.24SN Ic0.041
TNS2020dol [ZTF20aardftr]10:25:49.123+10:28:19.64OtherSDSS J102549.01+102817.60.132Transient not seen in acquisition image10:25:49.123+10:28:19.64