AstroNote 2023-346

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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
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftSourcePhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2023zst [ATLAS23xft]03:30:31.979-52:26:22.89SN Ia0.1770.177pre-maxRedshift from known host galaxy.03:30:31.979-52:26:22.89SN Ia0.177
TNS2023zwx [ZTF23abtttrl]09:35:11.196+01:20:59.63SN Ia-91T-like0.0620.06193pre-maxRedshift from known host galaxy.09:35:11.190+01:20:59.50SN Ia-91T-like0.062
TNS2023zpr [ATLAS23xeg]07:16:19.674+01:23:18.82SN Ia0.055WISEA J071619.80+012319.9maxRedshift from SNID template matching.07:16:19.674+01:23:18.82SN Ia0.055
TNS2023zvn [PS23lvq]10:42:18.976+19:06:58.13SN Ia0.0480.048pre-maxRedshift from known host galaxy.10:42:18.990+19:06:58.14SN Ia0.048
TNS2023wob [ATLAS23vdl]04:42:33.100-15:16:40.20SN IIn0.036maxRedshift from narrow halpha features. Possible AGN due to small/no offset of the transient.04:42:33.100-15:16:40.20SN IIn0.036
TNS2023yxs [ATLAS23wto]06:26:04.646-31:15:25.01SN IIn0.112maxRedshift from narrow halpha features. Given the large offset from the galaxy nucleus IIn much more likely than AGN.06:26:04.638-31:15:25.40SN IIn0.112
TNS2023yqw [GOTO23bub]00:17:38.324+22:43:55.74SN IIn0.086pre-maxRedshift from narrow halpha features. Emission is slightly offset from the host galaxy center.00:17:38.324+22:43:55.74SN IIn0.086
TNS2023yeu [PS23kti]04:19:34.463+04:18:17.87SN IIn0.024pre-maxRedshift from narrow halpha features. Offcenter position is more suggestive of a IIn than an AGN04:19:34.470+04:18:17.82SN IIn0.024