DRAFT
2021-02-03 17:01:18
Type: Object/s-Discovery/Classification
Bibcode: 2021TNSAN..50....1T
ePESSTO+ spectroscopic classification of optical transients
Authors: J. Terwel, L. Harvey, S. Prentice, M. Magee (TCD), S. Benetti (INAF), J. Sollerman (Stockholm), M. Fulton, S. Srivastav (QUB), T.-W. Chen (Stockholm), J. Anderson (ESO), T. Müller 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 (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith, S. J. Smartt, J. Gillanders, O. McBrien (QUB)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes the classification of 3 Type Ia SNe, 1 Type Ic-BL, and 1 blue transient at an unknown redshift. We also report negative transient detections for two targets.

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 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 2021 Feb 02, 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 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
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Source Phase (days) Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2021bmt [ATLAS21dkl] 06:12:32.851 -21:07:24.06 SN Ia 0.07 Max z from classification software 06:12:32.850 -21:07:24.06 SN Ia 0.07
TNS 2021bmc [ATLAS21djm] 08:28:59.711 +12:25:09.70 Blue transient with unknown redshift, possibly a young Type II. 08:28:59.713 +12:25:09.77 SN II 0.05
TNS 2021bma [ATLAS21djh] 07:23:42.811 -33:33:55.06 Low S/N spectrum, possibly stellar 07:23:42.811 -33:33:55.06
TNS 2021bmx [ATLAS21dkt] 10:14:50.259 -38:11:29.84 SN Ia 0.0146 Max 10:14:50.250 -38:11:29.90 SN Ia 0.0146
TNS 2021ble [Gaia21any] 11:39:03.590 -09:24:37.15 SN Ia 0.045 Max z from classification software 11:39:03.590 -09:24:37.15 SN Ia 0.045
TNS 2021aks [ATLAS21cbe] 10:58:52.845 -49:57:49.68 Galaxy 0.0092 Only galaxy visible 10:58:52.845 -49:57:49.68 Galaxy 0.0092
TNS 2021bmf [ATLAS21djt] 16:33:29.408 -06:22:49.58 SN Ic-BL 0.04 Redshift is uncertain, with a range of possible values from 0.02 to 0.09. 16:33:29.416 -06:22:49.51 SN Ic-BL 0.04

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