DRAFT
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+
Abstract:
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 http://www.pessto.org (via WISeREP) and the IAU Transient Name Server.

The classified objects are listed in the Related Objects table below.

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Source Phase (days) Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2020abf [ATLAS20avl] 09:18:05.959 -15:48:44.85 SN Ic 0.017 WISEA J091805.83-154841.8 0.016064 ATLAS Redshift from SNID and host lines. A reddened Ic, with prominent Ca II and O I features on the red. 09:18:05.955 -15:48:44.95 SN Ic 0.017
TNS 2020agu [ATLAS20bkr] 11:58:31.597 -20:41:53.59 SN II 0.025 PGC157191 ATLAS Redshift from host lines 11:58:31.599 -20:41:53.59 SN II 0.025
TNS 2020sj [ZTF20aadtarr] 09:26:19.874 -07:28:30.07 SN IIn 0.078 ZTF 09:26:19.860 -07:28:30.00 SN IIn 0.077
TNS 2020ym [ATLAS20bzn] 12:23:04.310 -28:04:07.46 SN Ia 0.026 ATLAS Redshift from NED, consistent with SNID matches 12:23:04.310 -28:04:07.46 SN Ia 0.026

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