AstroNote 2020-20

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2020-01-22 17:17:26
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: I. Irani, E. Zimmerman, S. Schulze, R. Bruch, O. Yaron (Weizmann), L. Galbany (UGR), C. Gutierrez (Southampton), A. De Cia (Geneva), 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), 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 Ic, Ia, II and IIn.

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 21, 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 RedshiftSourcePhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2020abf [ATLAS20avl]09:18:05.959-15:48:44.85SN Ic0.017WISEA J091805.83-154841.80.016064ATLASRedshift from SNID and host lines. A reddened Ic, with prominent Ca II and O I features on the red.09:18:05.955-15:48:44.95SN Ic0.017
TNS2020agu [ATLAS20bkr]11:58:31.597-20:41:53.59SN II0.025PGC157191ATLASRedshift from host lines11:58:31.599-20:41:53.59SN II0.025
TNS2020sj [ZTF20aadtarr]09:26:19.874-07:28:30.07SN IIn0.078ZTF09:26:19.860-07:28:30.00SN IIn0.077
TNS2020ym [ATLAS20bzn]12:23:04.310-28:04:07.46SN Ia0.026ATLASRedshift from NED, consistent with SNID matches12:23:04.310-28:04:07.46SN Ia0.026