DRAFT
2023-12-17 15:57:32
Type: Object/s-Discovery/Classification
Bibcode: 2023TNSAN.346....1S
ePESSTO+ spectroscopic classification of optical transients
Authors: T. Schweyer (OKC/SU), P. Pessi (OKC/SU), S. Barmentloo (OKC/SU), J. Sollerman (OKC/SU), S. Schulze (NW), P. Charalampopoulos, (Turku), A. Gkini (OKC/SU), S. Srivastav (Oxford), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (ICE), M. Nicholl (QUB), E. Zimmerman (Weizmann), 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 4 Type Ia supernovae and 4 Type IIn supernovae.

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 Pan-STARRS Survey for Transients (Chambers et al. 2016 2016arXiv161205560C), 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) and the Gravitational-wave Optical Transient Observer GOTO (see Dyer et al. 2020, SPIE, 11445 2020SPIE11445E..7GD).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2023-12-16, using EFOSC2 and Grism 13 (3985-9315A, 18A 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 2023zst [ATLAS23xft] 03:30:31.979 -52:26:22.89 SN Ia 0.177 0.177 pre-max Redshift from known host galaxy. 03:30:31.979 -52:26:22.89 SN Ia 0.177
TNS 2023zwx [ZTF23abtttrl] 09:35:11.196 +01:20:59.63 SN Ia-91T-like 0.062 0.06193 pre-max Redshift from known host galaxy. 09:35:11.190 +01:20:59.50 SN Ia-91T-like 0.062
TNS 2023zpr [ATLAS23xeg] 07:16:19.674 +01:23:18.82 SN Ia 0.055 WISEA J071619.80+012319.9 max Redshift from SNID template matching. 07:16:19.674 +01:23:18.82 SN Ia 0.055
TNS 2023zvn [PS23lvq] 10:42:18.976 +19:06:58.13 SN Ia 0.048 0.048 pre-max Redshift from known host galaxy. 10:42:18.990 +19:06:58.14 SN Ia 0.048
TNS 2023wob [ATLAS23vdl] 04:42:33.100 -15:16:40.20 SN IIn 0.036 max Redshift from narrow halpha features. Possible AGN due to small/no offset of the transient. 04:42:33.100 -15:16:40.20 SN IIn 0.036
TNS 2023yxs [ATLAS23wto] 06:26:04.646 -31:15:25.01 SN IIn 0.112 max Redshift from narrow halpha features. Given the large offset from the galaxy nucleus IIn much more likely than AGN. 06:26:04.638 -31:15:25.40 SN IIn 0.112
TNS 2023yqw [GOTO23bub] 00:17:38.324 +22:43:55.74 SN IIn 0.086 pre-max Redshift from narrow halpha features. Emission is slightly offset from the host galaxy center. 00:17:38.324 +22:43:55.74 SN IIn 0.086
TNS 2023yeu [PS23kti] 04:19:34.463 +04:18:17.87 SN IIn 0.024 pre-max Redshift from narrow halpha features. Offcenter position is more suggestive of a IIn than an AGN 04:19:34.470 +04:18:17.82 SN IIn 0.024

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