AstroNote 2023-286

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DRAFT
2023-10-31 15:21:21
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: B. Warwick (Warwick), E. Hueichapan (UDP), M. Pursiainen, A. Sahu, A. Kumar, J. Lyman, D. Coppejans, D. O’Neill, K. Ackley, M. Magee (Warwick), S. Srivastav (QUB), L. Galbany (IEEC/ICE-CSIC), P. Wiseman (Southampton), S. Benetti (INAF-OAPd), J. Anderson (ESO), T. Müller Bravo (ICE), T.-W. Chen (Stockholm/TUM/MPA), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (QUB), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann), J. Tonry, L. Denneau, H. Weiland, A. Lawrence, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (SAAO), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt (Oxford/QUB), K. W. Smith, D. R. Young, M. Fulton, 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+
Abstract:
This report includes classifications of 1 Type Ib, 8 Type Ia, 2 Type Ia-91T-like supernovae, and 1 event with a blue and featureless spectrum.

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), and by the Xingming Observatory Sky Survey (XOSS).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 30 October 2023, 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
TNS2023vyy [ZTF23abnpddd]21:15:00.739-12:48:18.88SN Ia0.07LEDA 9473490.07Good match to SNID template for Ia21:15:00.739-12:48:18.88SN Ia0.07
TNS2023vqn [ATLAS23unj]22:52:31.722+18:14:06.48SN Ia0.07SNID match with Ia, with SNID redshift match for 0.0722:52:31.726+18:14:06.46SN Ia0.07
TNS2023vxb [ZTF23abndgcq]21:42:29.397+18:24:32.24SN Ia0.05SNID match with type Ia supernova with redshift 0.0521:42:29.399+18:24:32.22SN Ia0.05
TNS2023way [XM123MZ]21:24:11.159+15:59:23.03Other0.029SDSS J214229.44+182424.50.029Blue continuum. Associated with galaxy at known redshift of 0.029.21:24:11.150+15:59:22.92SN II0.018429
TNS2023vxc [ZTF23abndank]20:25:23.804-12:23:37.95SN Ia-91T-like0.07Good SNID template match for SN Ia-91T, with SNID redshift 0.0720:25:23.800-12:23:37.82SN Ia-91T-like0.07
TNS2023vyx [ZTF23abnpjlt]21:20:44.376-09:31:18.22SN Ia0.08SDSS J212044.24-093116.6Good SNID match for SN Ia with redshift 0.0821:20:44.383-09:31:18.40SN Ia0.08
TNS2023wbw [ATLAS23usx]00:36:18.780+11:23:30.59SN Ia0.036WISEA J003618.14+112335.30.036Good SNID template match with SN Ia at the host redshift.00:36:18.791+11:23:29.90SN Ia0.036
TNS2023vwr [ZTF23abnkwpb]23:20:52.321-04:11:36.28SN Ia0.06Good SNID template match with SN Ia of redshift 0.06.23:20:52.328-04:11:36.48SN Ia0.06
TNS2023wbt [ZTF23abnpoqp]23:45:51.159-06:46:56.06SN Ib0.0360.036Good match with SNID template for SN Ib at the host galaxy redshift of 0.036.23:45:51.158-06:46:56.13SN Ib0.036
TNS2023vvy [ZTF23abmtzcg]23:39:03.253-16:35:11.43SN Ia0.09Good SNID match to Ia with redshift 0.0923:39:03.257-16:35:11.58SN Ia0.09
TNS2023vqm [ATLAS23uni]23:12:18.318-76:19:10.76SN Ia0.065Redshift from narrow host lines23:12:18.318-76:19:10.76SN Ia0.065
TNS2023wbx [ATLAS23utg]23:59:25.293-41:26:03.39SN Ia-91T-like0.06Good SNID template match to SN Ia-91T with redshift 0.06.23:59:25.310-41:26:03.37SN Ia-91T-like0.06