AstroNote 2020-262

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DRAFT
2020-12-22 16:00:09
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Pessi (ESO), K. W. Smith, S. Srivastav (QUB), C. Gutierrez (Turku), S. Prentice (TCD), S. Yang, T.-W. Chen (Stockholm), S. Benetti (INAF), 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), S. J. Smartt, O. McBrien (QUB)
Source Group: ePESSTO+
Abstract:
This report includes classifications of 4 Type Ia's, 1 Type Ic-BL, 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 (Smith et al. 2020 2020arXiv200309052S), the Zwicky Transient Facility ZTF (Bellm et al. 2019 2019PASP..131a8002B) - data stream processed through the Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3a..26S), and the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014 2014ApJ...788...48S).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2020 December 21, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) and GELATO (Harutyunyan et al. 2008 2008A&A...488..383H).

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
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftSourcePhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2020adaf [ASASSN-20pz]02:25:07.793-61:33:20.77SN Ia0.048ESO 115-IG 010 NED020.048597ASAS-SN-3 to +3Based on the redshift, the measured Si II line velocity is approximately 9700 km/s.02:25:07.793-61:33:20.77SN Ia0.048
TNS2020acmf [ZTF20acxdawc]02:43:26.807+16:39:46.47SN Ia0.025VV 278c0.025318ZTF-3 to +3Based on the redshift, the measured Si II line velocity is approximately 8800 km/s.02:43:26.807+16:39:46.47SN Ia0.025
TNS2020aboq [ATLAS20bgoz]06:38:23.730-35:13:29.14SN Ic-BL0.02ATLAS+8 to +10The spectrum resembles the broad line Type Ic SN 2009bb06:38:23.730-35:13:29.14SN Ic-BL0.02
TNS2020acrz [ATLAS20biio]05:32:59.255-19:07:02.63SN Ia0.069ATLAS-3 to +3Redshift from SNID. Based on the redshift, the measured Si II line velocity is approximately 10400 km/s.05:32:59.249-19:07:02.59SN Ia0.069
TNS2020acjd [ZTF20acwogqz]10:40:41.576+27:19:07.70SN Ia0.09WISEA J104041.63+271909.00.090981ZTF-3 to +3Based on the redshift, the measured Si II line velocity is approximately 10500 km/s.10:40:41.576+27:19:07.70SN Ia0.09
TNS2020acvc [ZTF20acxvcoe]01:30:08.539+19:10:09.99ZTFNot visible in the acquisition image01:30:08.539+19:10:09.99
TNS2020acdz [ZTF20acwlsro]06:13:19.620-26:47:24.90SN II0.074ZTF+11 to +2006:13:19.620-26:47:24.90SN II0.074