AstroNote 2021-1

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2021-01-02 15:53:04
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Pessi (ESO), K. W. Smith (QUB), C. Gutierrez (Turku), L. Galbany (Granada), G. Pignata (UNAB), S. Yang, Janet Chen (Stockholm), 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), S. J. Smartt, O. McBrien, S. Srivastav (QUB)
Source Group: ePESSTO+
This report includes classifications of 2 Type Ia's, and 1 Type II.

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).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2021 January 1, 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 (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
TNS2020adns [ATLAS20bjhq]02:54:34.202-46:07:29.05SN Ia0.074ATLAS-3 to +3Redshift from SNID. Based on the redshift, the measured Si II line velocity is approximately 11200 km/s02:54:34.170-46:07:29.10SN Ia0.074
TNS2020aejj [ATLAS20bjou]05:01:03.906-38:26:54.97SN Ia-91bg-like0.0566dFGS gJ050103.2-3826500.056ATLAS+4 to +7Based on the redshift, the measured Si II line velocity is approximately 8500 km/s.05:01:03.906-38:26:54.97SN Ia-91bg-like0.056
TNS2020aeqo [ATLAS20bjua]03:09:51.384-11:58:43.11SN II0.031MCG-02-09-0070.031ATLAS-3 to +3Redshift measured from the narrow host galaxy H-alpha.03:09:51.390-11:58:43.18SN II0.031