AstroNote 2020-256

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2020-12-15 15:44:11
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Pessi (ESO), J. Anderson (ESO), C. Gutierrez (Turku), L. Galbany (Granada), M. Dennefeld (IAP), T. Muller-Bravo (Southampton), S. Benetti (INAF), J. Sollerman, T.-W. Chen (Stockholm), 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
Source Group: ePESSTO+
This report includes classifications of 5 Type Ia's, and 2 Type II's.

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 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).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2020 December 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
TNS2020abcq [ATLAS20bgez]08:44:31.500-20:20:47.36SN II0.01152ESO 563- G 017ATLASAround maxAn absolute mag of -15.1 mag is obtained by using a distance of 51.8 Mpc (m-M=33.57), the ATLAS magnitude on Dec 9 (o=18.8 mag) and the Milky Way Ao=0.3 mag. This magnitude is consistent with the sample of low-luminosity SN II.08:44:31.500-20:20:47.36SN II0.0115
TNS2020abgv [ZTF20acumekm]02:38:40.800-26:59:16.15SN Ia0.0572MASX J02384125-2659160ZTF+7 to +10Redshift from SNID02:38:40.800-26:59:16.15SN Ia0.057
TNS2020abqu [ATLAS20bgpq]04:13:49.944-14:10:27.15SN Ia0.044LEDA 146132ATLAS+4 to +7Redshift from SNID04:13:49.975-14:10:27.31SN Ia0.044
TNS2020abyx [ATLAS20bhby]13:32:07.159-22:57:17.71SN Ia0.0169ESO 509-45ATLAS+2013:32:07.160-22:57:17.50SN Ia0.0169
TNS2020acbm [ZTF20acwgxhk]02:40:17.798+02:25:37.47SN II0.0212MASX J02401761+0225364ZTF-3 to +302:40:17.800+02:25:37.45SN II0.021
TNS2020acma [ATLAS20bhnw]10:37:57.847-28:54:30.70SN Ia0.014ESO 437-19ATLAS-7 to -410:37:57.860-28:54:30.78SN Ia0.014
TNS2020acol [ZTF20acxkxxr]22:23:58.293-04:04:20.08SN Ia0.016328NGC 7266ZTFAround max22:23:58.284-04:04:20.03SN Ia0.0163