DRAFT
2023-12-31 11:52:42
Type: Object/s-Discovery/Classification
Bibcode: 2023TNSAN.362....1B
ePESSTO+ spectroscopic classification of optical transients
Authors: S. Barmentloo, P. Pessi, S. Brennan, J. Sollerman (OKC/SU), M. Fulton (QUB), M. Gromadzki (Warsaw), J. Anderson (ESO), T.-W. Chen (NCU), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (ICE), M. Nicholl (QUB), O. Yaron (Weizmann), D. Young (QUB), J. Tonry, L. Denneau, H. Weiland, A. Lawrence, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt (Oxford/QUB), K. W. Smith, S. Srivastav, M. McCollum, T. Moore, J. Weston (QUB), L. Shingles (GSI/QUB), L. Rhodes (Oxford), J. Sommer (LMU/QUB), A. Rest (STScI), C. Stubbs (Harvard)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 3 Type Ia SNe, 1 Type II SN, 1 Type Ic SLSN, 1 Type Ib SN, and 1 CV.

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 2020PASP..132h5002S) and the Zwicky Transient Facility ZTF (Bellm et al. 2019 2019PASP..131a8002B) - data stream processed through the Lasair broker (Smith et al. 2019 2019RNAAS...3...26S) and by the ALeRCE broker (Forster et al. 2020 2021AJ....161..242F), 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 2023-12-21, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution) or Grism 11 (3380-7520, 16A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B).

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 2023absw [ATLAS23xxa] 00:49:00.552 -49:54:52.94 SN Ia 0.08 at max Redshift found using SNID 00:49:00.552 -49:54:52.94 SN Ia 0.08
TNS 2023zzj [ZTF23abteoep] 03:24:46.935 +02:49:50.99 SN Ia 0.12 +5 to +10 Redshift found using SNID 03:24:46.935 +02:49:50.99 SN Ia 0.12
TNS 2023abjs [ATLAS23xwi] 03:38:51.894 -34:21:47.82 SN Ia 0.063 <-10 Redshift from Halpha and other narrow host lines 03:38:51.894 -34:21:47.82 SN Ia 0.063
TNS 2023aaui [ATLAS23xus] 03:43:36.012 -11:53:13.06 CV 03:43:36.009 -11:53:13.09 CV
TNS 2023xth [ZTF23abqkppm] 06:44:45.142 +31:03:40.02 SN II 0.017 at max Redshift from narrow host lines. Classification in agreement with ZTF Class. Rep. 16311. 06:44:45.142 +31:03:40.02 SN II 0.017
TNS 2023utm [ATLAS23ubl] 06:50:51.760 -60:24:18.20 SLSN-I 0.33 >15 Redshift found using SNID. At this redshift the transient is around -23 mags. Followup is encouraged. 06:50:51.760 -60:24:18.20 SLSN-I 0.33
TNS 2023ysa [Gaia23dlm] 12:39:15.200 -26:54:27.79 SN Ib 0.01 WISEA_J123915.44-265420.7 0.009927 >15 Redshift taken from known host WISEA_J123915.44-265420.7. Spectrum resembles the Type IIb SN 1993J at similar epochs. 12:39:15.200 -26:54:27.79 SN Ib 0.01

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