AstroNote 2020-206

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DRAFT
2020-10-24 15:26:40
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: M. Gromadzki, N. Ihanec (Warsaw), E. Callis, M. Fraser (UCD), C. Gutierrez (Turku), S. Taubenberger (MPA Garching), 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 (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),
Source Group: ePESSTO+
Abstract:
This report includes classifications of 7 Type Ia's, 3 Type II's, 1 Type IIn, 1 Type Ib, 1 Type I, and 2 objects with blue featureless spectra. SN2020xkg is a Type II SN at ~+30d showing very low photospheric velocities. AT2020wgs possibly displays a weak broad feature corresponding to Halpha . Follow-up observations are encouraged to verify this classification.

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), 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 Oct 23, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B). 

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
TNS2020xtq [ATLAS20beeq]00:02:21.567-15:19:56.31SN Ia0.12at max00:02:21.567-15:19:56.31SN Ia0.12
TNS2020xkx [ATLAS20bdpu]23:20:28.169+22:59:12.93SN IIn0.041523:20:28.170+22:59:12.84SN IIn0.0415
TNS2020voh [ATLAS20bcya]23:03:40.290-36:01:40.30SN II0.01+4 to +723:03:40.290-36:01:40.30SN II0.01
TNS2020wpq [ATLAS20beav]02:04:50.860-17:45:40.40SN Ib0.038at max02:04:50.860-17:45:40.40SN Ib0.038
TNS2020why [ATLAS20bedf]08:16:47.543-09:19:39.55SN I0.06WISEA J081647.21-091938.7> +2008:16:47.543-09:19:39.55SN I0.06
TNS2020xkg [ATLAS20bdor]09:14:38.940-19:33:18.34SN II0.017> +2009:14:38.957-19:33:18.57SN II0.017
TNS2020xpy [ATLAS20bens]05:23:56.613-21:57:00.07SN Ia-91T-like0.146WISEA J052356.58-215700.9at max05:23:56.596-21:57:00.31SN Ia-91T-like0.146
TNS2020wob [ATLAS20becl]23:13:37.121+04:08:56.24SN Ia0.04SDSS J231337.27+040857.40.065at max23:13:37.120+04:08:56.18SN Ia0.04
TNS2020xps [ATLAS20bent]02:57:33.993+13:28:31.77SN Ia0.07WISEA J025733.72+132831.6at max02:57:34.013+13:28:31.54SN Ia0.07
TNS2020xkw [ATLAS20bdpt]01:30:56.896+18:52:48.11Blue featureless continuum.01:30:56.896+18:52:48.11
Other2020xzg [ATLAS20beli]00:15:06.237-24:41:39.76Blue featureless continuum.
Other2020xom [ATLAS20bdxe]05:26:33.491-07:57:41.24SN Ia0.12at max
TNS2020vst [ATLAS20bddo]00:18:42.748-26:14:19.29SN Ia0.12at max00:18:42.748-26:14:19.29SN Ia0.12
TNS2020xit [ZTF20ackobeu]01:35:52.698-05:47:39.99SN Ia0.1SDSS J013552.59-054741.30.113at max01:35:52.698-05:47:39.99SN Ia0.1
TNS2020wgs [ATLAS20bdjc]08:32:26.374-03:12:11.49Possible detection of broad feature corresponding to Halpha08:32:26.374-03:12:11.57SN II0.03107