AstroNote 2020-35

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2020-02-04 16:33:14
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: I. Irani, E. Zimmerman, O. Yaron, R. Bruch (Weizmann), S. C. Williams (Turku), S. Taubenberger (MPA Garching), N. Ihanec (Warsaw), J. Anderson (ESO), T. Muller Bravo (Southampton), T.-W. Chen (Stockholm), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), D. R. 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 4 SNe; 3 Type Ia, and a 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) 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 3, 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
TNS2020aqd [ATLAS20ckz]11:53:13.830-07:42:32.22SN Ia0.07ATLAS+3Redshift from SNID. Possibly a 91T-like (best SNID matches to 99aa).11:53:13.830-07:42:32.22SN Ia0.07
TNS2020bpz [ATLAS20ewz]11:40:58.514-11:26:56.72SN Ia0.04ATLAS-9Redshift from SNID11:40:58.565-11:26:57.44SN Ia0.04
TNS2020bqo [ZTF20aalkcea]03:07:24.525-13:39:01.34SN Ia-91T-like0.0317WISEA J030724.90-133904.60.031729ZTF-10Redshift from NED03:07:24.527-13:39:01.36SN Ia0.031729
TNS2020bad [ZTF20aaiovoy]09:24:26.676+20:38:05.74SN II0.028ZTFRedshift from spectrum host lines09:24:26.676+20:38:05.74SN II0.028