AstroNote 2020-13

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2020-01-16 17:47:16
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: S. Schulze, I. Irani, E. Zimmerman, R. Bruch, O. Yaron (Weizmann), N. Elias-Rosa (INAF-OAPd), G. Pignata (UNAB/MAS), M. Fraser (UCD), K. Maguire (TCD), 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 a Type Ia, a possible Ia-91bg-like at z=0.09, a likely nearby (z=0.009) young Type II and a host-dominated spectrum at z=0.169.

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 Jan 15, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B), Superfit (Howell et al. 2005 2005ApJ...634.1190H) and astroDASH (Muthukrishna et al. 2019 2019arXiv190302557M).

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 RedshiftRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2020yo [ZTF20aafqpum]03:06:06.499+13:54:48.43SN Ia-91bg-like0.09Redshift from SNID/astroDASH03:06:06.513+13:54:48.57SN Ia-91bg-like0.09
TNS2020xr [ZTF20aafgbrf]06:28:22.171+21:38:47.75SN Ia0.03WISEA J062821.96+213847.8Redshift from SNID/astroDASH06:28:22.180+21:38:48.01SN Ia0.03
TNS2020vg [ZTF20aafclxb]11:48:54.440-04:40:53.93SN II0.0087IC 07380.008683Blue featureless continuum. Redshift from NED11:48:54.430-04:40:53.76SN II0.0087
TNS2020mw [ZTF20aabhraq]08:10:47.238+11:31:15.80Other0.169Not clear if there is transient signal above the host light, but there is possibly a blue continuum on top of the galaxy. Halpha is on top of a telluric (so not a p-cyg), and possible wide Si II absorption to the left. Redshift from host lines.08:10:47.238+11:31:15.800.169