DRAFT
2023-12-18 14:52:48
Type: Object/s-Discovery/Classification
Bibcode: 2023TNSAN.347....1B
ePESSTO+ spectroscopic classification of optical transients
Authors: S. Barmentloo (OKC/SU), P. Pessi (OKC/SU), T. Schweyer (OKC/SU), J. Sollerman (OKC/SU), G. Leloudas (DTU Space), A. Gkini (OKC/SU), P. Wiseman (Southampton), S. Benetti (INAF OAPd), S. Schulze (NW), P. Charalampopoulos, (Turku), S. Srivastav (Oxford), E. Zimmerman (Weizmann), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), 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, M. Fulton, M. McCollum, T. Moore, M. Nicholl, J. Weston (QUB), L. Shingles (GSI/QUB), L. Rhodes (Oxford), J. Sommer (LMU/QUB), A. Rest (STScI), C. Stubbs (Harvard), K. C. Chambers, M. Huber, A. Schultz, T. de Boer, J. Bulger, J. Fairlamb, C.-C. Lin, T. Lowe, E. Magnier, P. Minguez, R. J. Wainscoat, H. Gao (IfA, Hawaii)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes the classification of three Type Ia, two Type II supernovae and one SLSN-IIn supernova.

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), 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...3...26S) and by the ALeRCE broker (Forster et al. 2020 2021AJ....161..242F).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2023-12-17, 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 2023zeh [ATLAS23wzl] 01:11:14.380 +07:07:53.51 SN II 0.04 pre-max Redshift from SNID template matching. Roughly matches the photo-z of 0.052 of the host galaxy. 01:11:14.380 +07:07:53.51 SN II 0.04
TNS 2023ywq [ATLAS23wrd] 01:03:41.438 -39:52:29.81 SN Ia 0.03 0.03 pre-max Redshift from host galaxy. 01:03:41.420 -39:52:29.93 SN Ia 0.03
TNS 2023qwe [ZTF23aazyfss] 02:53:13.207 -00:20:57.27 SN II 0.038 SDSS J025313.06-002054.4 0.03781493 pre-max Redshift from host galaxy. 02:53:13.207 -00:20:57.27 SN II 0.038
TNS 2023zof [ATLAS23xcj] 10:16:15.344 +18:35:19.14 SN Ia 0.039 0.039 max Redshift from host galaxy. 10:16:15.350 +18:35:19.10 SN Ia 0.039
TNS 2023zea [ATLAS23wxe] 09:53:07.627 -37:59:54.39 SN Ia 0.04 pre-max Redshift from SNID template matching. 09:53:07.627 -37:59:54.39 SN Ia 0.04
TNS 2023zeq [ZTF23abqygjv] 01:08:54.190 -20:38:23.99 SLSN-II 0.194 pre-max SLSN-IIn subclass. Redshift from narrow H-beta and H-gamma. The large absolute magnitude (M = - 21 mag) and long rise time (more than 30 days) confirm a SLSN classification. 01:08:54.204 -20:38:24.31 SLSN-II 0.194

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