AstroNote 2021-68

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2021-02-16 16:48:10
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: L. Harvey, M. Magee, S. Prentice, M. Deckers (TCD), S. Schulze (Weizmann), J. Teffs (LJMU), S. Gonzalez-Gaitan (CENTRA), M. Dennefeld (IAP), S. Benetti (INAF), M. Gromadzki (Warsaw), J. Anderson (ESO), T. Müller Bravo (Southampton), T.-W. Chen (Stockholm), 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 (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith, S. J. Smartt, J. Gillanders, O. McBrien, and S. Srivastav (QUB).
Source Group: ePESSTO+
This report includes classifications of 3 normal Type Ia SNe, one SN Ia-91T, one young Type II SN showing flash features, and one object was classified as a CV.

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), 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 2021 Feb 15, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B), GELATO (Harutyunyan et al. 2008 2008A&A...488..383H), and a custom classification tool.

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 RedshiftPhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2021cle [ATLAS21eft]05:15:58.878-38:47:38.08SN Ia0.059+4 to +10Redshift from classification software05:15:58.878-38:47:38.08SN Ia0.059
TNS2021cpg [ATLAS21epl]05:19:56.653-33:58:51.94SN Ia0.077maxRedshift from SNID05:19:56.653-33:58:51.94SN Ia0.077
TNS2021clw [ASASSN-21bg]05:51:19.939-50:34:57.14SN Ia0.0234NGC 21150.023389maxKnown host redshift05:51:19.939-50:34:57.14SN Ia0.0234
TNS2021css [ASASSN-21bn]08:13:40.428-67:49:23.20CV08:13:40.428-67:49:23.20CV
TNS2021dbg [ATLAS21gfy]09:24:26.801-06:34:53.09SN II0.0205-13Known host redshift09:24:26.796-06:34:53.12SN II0.02
TNS2021ctn [ATLAS21fhx]10:52:54.363-00:46:21.33SN Ia-91T-like0.0946-9Known host redshift10:52:54.363-00:46:21.33SN Ia-91T-like0.0946