AstroNote 2020-33

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2020-02-02 18:52:05
Type: Object/s-Discovery/Classification
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+
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 (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
TNS2020avf [ZTF20aaiahra]11:02:59.420-16:17:31.45SN Ib0.013NGC 35080.013006ZTFSpectrum 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).11:02:59.420-16:17:31.45SN Ib0.013006
TNS2020avg [ZTF20aaiawlj]11:34:06.120-09:01:18.41SN Ia0.0367WISEA J113406.16-090116.20.036705ZTF+2Redshift from NED11:34:06.120-09:01:18.41SN Ia0.0367
TNS2020aze [ATLAS20efg]10:37:15.343-41:37:29.59SN II0.009NGC3318ATLASRedshift from NED10:37:15.270-41:37:28.92SN II0.009
TNS2020bij [ATLAS20eqz]10:55:11.680-26:08:24.47SN II0.013NGC 3463ATLASRedshift from NED10:55:11.680-26:08:24.47SN II0.013
TNS2020bjk [ATLAS20era]12:07:44.777-32:00:48.38SN Ia0.022ATLAS-8Redshift from NED12:07:44.777-32:00:48.38SN Ia0.022
TNS2020bkp [ASASSN-20bm]13:34:00.408-50:29:56.29SN II0.012ESO 220- G 0190.013231ASAS-SNRedshift from SNID and host features in spectrum13:34:00.450-50:29:55.82SN II0.012
TNS2020amv [ZTF20aahbamv]08:49:40.678+30:11:14.51SN II0.0452ZTFBlue and almost featureless spectrum. Redshift from NED and weak spectrum lines.08:49:40.690+30:11:14.64SN II0.0452