DRAFT
2020-02-02 18:52:05
Type: Object/s-Discovery/Classification
Bibcode: 2020TNSAN..33....1Z
ePESSTO+ spectroscopic classification of optical transients
Authors: E. Zimmerman, I. Irani, R. Bruch, O. Yaron, A. Gal-Yam (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+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 7 SNe; 2 Type Ia, 4 Type II and a Type Ib in the nearby galaxy NGC 3508 (z=0.013).

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), 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) 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 Feb 1, 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 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 2020avf [ZTF20aaiahra] 11:02:59.420 -16:17:31.45 SN Ib 0.013 NGC 3508 0.013006 ZTF Spectrum dominated by galaxy light, with underlying wide SN features. Reasonable Superfit matches to Types Ib/c; likely a Ib (He I features seem to exist). 11:02:59.420 -16:17:31.45 SN Ib 0.013006
TNS 2020avg [ZTF20aaiawlj] 11:34:06.120 -09:01:18.41 SN Ia 0.0367 WISEA J113406.16-090116.2 0.036705 ZTF +2 Redshift from NED 11:34:06.120 -09:01:18.41 SN Ia 0.0367
TNS 2020aze [ATLAS20efg] 10:37:15.343 -41:37:29.59 SN II 0.009 NGC3318 ATLAS Redshift from NED 10:37:15.270 -41:37:28.92 SN II 0.009
TNS 2020bij [ATLAS20eqz] 10:55:11.680 -26:08:24.47 SN II 0.013 NGC 3463 ATLAS Redshift from NED 10:55:11.680 -26:08:24.47 SN II 0.013
TNS 2020bjk [ATLAS20era] 12:07:44.777 -32:00:48.38 SN Ia 0.022 ATLAS -8 Redshift from NED 12:07:44.777 -32:00:48.38 SN Ia 0.022
TNS 2020bkp [ASASSN-20bm] 13:34:00.408 -50:29:56.29 SN II 0.012 ESO 220- G 019 0.013231 ASAS-SN Redshift from SNID and host features in spectrum 13:34:00.450 -50:29:55.82 SN II 0.012
TNS 2020amv [ZTF20aahbamv] 08:49:40.678 +30:11:14.51 SN II 0.0452 ZTF Blue and almost featureless spectrum. Redshift from NED and weak spectrum lines. 08:49:40.690 +30:11:14.64 SN II 0.0452

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