DRAFT
2023-04-18 14:07:11
Type: Object/s-Discovery/Classification
Bibcode: 2023TNSAN..89....1K
ePESSTO+ spectroscopic classification of optical transients
Authors: T . Kravtsov, T. Pessi (ESO), T. Müller-Bravo (ICE-CSIC), T. Moore (QUB), L. Galbany (ICE/IEEC), N. Ihanec (Warsaw), S. Benetti (INAF - OAPd), J. Anderson (ESO), T.-W. Chen (TUM/MPA), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (QUB), O. Yaron (Weizmann), D. Young (QUB)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 5 Type Ia's and 1 Type II. We encourage followup observations

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 ALeRCE broker (Forster et al. 2020 https://arxiv.org/abs/2008.03303).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2023 April 17, 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 NGSF (Next Generation SuperFit; AstroNote 2022-191, Howell et al. 2005 2005ApJ...634.1190H).

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 2023fix [ZTF23aaeqsvb] 15:16:10.389 +19:46:39.92 SN Ia 0.086 ZTF around peak Redshift from host galaxy lines in the spectrum 15:16:10.395 +19:46:39.85 SN Ia 0.086
TNS 2023eoa [ATLAS23gxz] 21:31:51.428 -31:44:43.33 SN Ia 0.069 ATLAS one week after peak Redshift from template matching best fits. 21:31:51.428 -31:44:43.33 SN Ia 0.069
TNS 2023eug [ATLAS23hou] 17:23:42.869 +13:31:26.84 SN II 0.018 ATLAS Redshift from template matching best fits. 17:23:42.871 +13:31:26.78 SN II 0.018
TNS 2023elc [ATLAS23euw] 19:58:36.754 -11:40:56.05 SN Ia 0.081 ATLAS two weeks after peak Redshift from template matching best fits. 19:58:36.754 -11:40:56.05 SN Ia 0.081
TNS 2023ezo [ZTF23aaekkai] 20:14:02.786 +18:24:07.73 SN Ia 0.07 WISEA J201402.74+182406.8 0.062 ZTF Redshift from host galaxy lines in the spectrum. Note that this value is slightly different to the one in NED. Good matches are found with SNe Ia-CSM and peculiar SNe Ia (including large galaxy contamination), so the classification is not entirely certain 20:14:02.786 +18:24:07.73 SN Ia 0.07
TNS 2023erm [ZTF23aaekato] 17:33:00.493 +16:10:58.94 SN Ia 0.08 WISEA J173300.64+161057.3 ZTF Redshift from template matching best fits. Large galaxy contamination. Good matches are found with SNe Ia but also peculiar SNe Ia, so the classification is not entirely certain 17:33:00.493 +16:10:58.94 SN Ia 0.08

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