AstroNote 2020-229

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2020-11-15 16:18:32
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: M. Gromadzki, N. Ihanec (Warsaw), T. Wevers (ESO), C. Gutierrez, S. C. Williams (Turku), L. Galbany (Granada), T.-W. Chen (Stockholm), S. Schulze (Weizmann), J. Anderson (ESO), T. Muller Bravo (Southampton), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron, I. Manulis (Weizmann), D. Young (QUB), 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), K. C. Chambers, T. de Boer, J. Bulger, J. Fairlamb, M. Huber, C.-C. Lin, T. Lowe, E. Magnier, A. Schultz, R. J. Wainscoat, M. Willman (IfA, Univ. Hawaii)
Source Group: ePESSTO+
This report includes classifications of 8 Type Ia's, a potentially very young SN Ib-pec, 1 AGN, and a cataclysmic variable.

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 Pan-STARRS Survey for Transients (Chambers et al. 2016 2016arXiv161205560C), 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), the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014 2014ApJ...788...48S), and by the ESA Gaia Photometric Science Alerts Team DPAC.

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2020 November 14, 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 (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
TNS2019pjl [Gaia19dvx]19:29:58.580-52:42:56.56AGN0.3redshift from narrow host emission lines19:29:58.580-52:42:56.56AGN0.3
TNS2020zdm [ASASSN-20nz]06:29:22.241-48:51:58.17SN Ia0.05WISEA J062922.45-485200.8around peak lightredshift from SNID06:29:22.293-48:51:58.30SN Ia0.05
TNS2020zei [Gaia20fde]12:00:11.010-44:21:33.88CVH Balmer absorption lines at z=0, Halpha filled in12:00:11.010-44:21:33.88CV
TNS2020zem [ATLAS20bfgx]01:20:52.273+04:47:43.90SN Ia0.034-10 to -5 days01:20:52.273+04:47:43.90SN Ia0.034
TNS2020zgh [ZTF20acpknjk]01:15:53.409+00:00:57.52SN Ia0.045SDSS J011553.38+000056.90.124-8 to -4 daysredshift from SNID01:15:53.433+00:00:57.61SN Ia0.045
TNS2020zgl [ZTF20acpjqxp]23:28:01.143-02:09:53.61SN Ib-pecMrk 11310.006501good match to SN Ib 2004gq, 9 days before peak.23:28:01.146-02:09:53.61SN Ib-pec0.0065
TNS2020zhh [PS20kxp]04:26:19.843-10:05:56.86SN Ia0.04-10 to -5 daysredshift from SNID04:26:19.843-10:05:56.86SN Ia0.04
TNS2020zjf [ZTF20acplqek]03:30:39.931+03:05:50.55SN Ia-91T-like0.085WISEA J033039.25+030552.7around peak lightredshift from SNID03:30:39.929+03:05:50.55SN Ia0.083
TNS2020zjn [ZTF20acpujxl]05:08:08.772+10:23:01.64SN Ia0.04WISEA J050808.37+102302.7-10 to -5 daysredshift from SNID05:08:08.774+10:23:01.64SN Ia0.04
TNS2020zbk [ATLAS20bfew]00:36:11.518-23:39:35.88SN Ia0.09around peak lightredshift from SNID00:36:11.513-23:39:35.89SN Ia0.09
TNS2020zhd [ATLAS20bfio]07:05:21.215+18:13:31.80SN Ia0.08around peak lightredshift from SNID07:05:21.201+18:13:31.80SN Ia0.08