DRAFT
2023-11-13 17:03:13
Type: Object/s-Discovery/Classification
Bibcode: 2023TNSAN.304....1A
ePESSTO+ spectroscopic classification of optical transients
Authors: A. Aamer, T. Moore (QUB), P. Ramsden (QUB/Birmingham), C. R. Angus (QUB), S. Srivastav (Oxford/QUB), K. W. Smith, M. Fulton (QUB), N. Ihanec (Warsaw), T. Nagao (Turku), P. J. Pessi (Stockholm), 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), S. Sim, J. Weston, X. Sheng (QUB), L. Shingles (GSI/QUB), S. J. Smartt (Oxford/QUB), H. Stevance, L. Rhodes, A. Andersson, J. Gillanders, S. Ramaiya (Oxford), L. Denneau, J. Tonry, H. Weiland, A. Lawrence, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech) A. Rest (STScI), C. Stubbs (Harvard)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
We report classification spectra of 2 optical transients. 2023xje exhibits a blue continuum with narrow emission features. 2023wtq exhibits a blue featureless continuum. Given its lack of host galaxy and slow light curve rise, 2023wtq is likely a SLSN candidate, but requires additional followup to confirm this.

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) and 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).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2023 November 12, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B), and Superfit (Howell et al. 2005 2005ApJ...634.1190H).

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 2023xje [ATLAS23vig] 05:38:52.978 -35:55:17.07 SN 0.035 0.035 Spectrum shows blue continuum with narrow OII, OIII and H-alpha emission features. 05:38:52.980 -35:55:16.93 SN II 0.035
TNS 2023wtq [ZTF23abochfb] 01:21:55.680 -03:46:19.96 SN Spectrum shows featureless blue continuum. 01:21:55.680 -03:46:20.10 SN Ic-BL 0.15

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