AstroNote 2020-264

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2020-12-23 17:22:13
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Pessi (ESO), C. Gutierrez (Turku), S. Yang, T.-W. Chen (Stockholm), S. Prentice (TCD), S. Benetti (INAF), J. Anderson (ESO), T. Muller Bravo (Southampton), M. Gromadzki (Warsaw), 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, 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 4 Type Ia's, 1 Type Ib

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), 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 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 December 22, 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
TNS2020aciz [ZTF20acwombm]10:03:21.747+02:50:19.87SN Ia0.124SDSS J100321.72+025020.20.124ZTF-3 to +3Based on the redshift, the measured Si II line velocity is approximately 17700 km/s10:03:21.738+02:50:19.92SN Ia0.124
TNS2020adgf [ASASSN-20qb]05:14:12.247-51:09:09.36SN Ia-91T-like0.06WISEA J051414.04-510859.30.060092ASAS-SN-3 to +3Based on the redshift, the measured Si II line velocity is approximately 9900 km/s.05:14:12.247-51:09:09.36SN Ia-91T-like0.06
TNS2020adkj [ATLAS20bisc]05:20:34.210+06:33:21.41SN Ia0.029CAIRNS J052035.10+063307.40.0295ATLAS-3 to +3Classification on agreement with what reported in the TNS Classification Report No. 832505:20:34.210+06:33:21.41SN Ia0.029
TNS2020adkz [ASASSN-20qg]11:37:30.197+19:02:35.34SN Ia0.029KUG 1134+1930.029603ASAS-SN-3 to +3Based on the redshift, the measured Si II line velocity is approximately 12700 km/s.11:37:30.140+19:02:34.15SN Ia0.029
TNS2020admc [ATLAS20bivy]11:54:06.074-39:51:52.69SN Ib0.016dFGS gJ115406.5-3951480.0096ATLAS-3 to +311:54:06.074-39:51:52.69SN Ib0.01