DRAFT
2023-10-30 15:27:37
Type: Object/s-Discovery/Classification
Bibcode: 2023TNSAN.285....1H
ePESSTO+ spectroscopic classification of optical transients
Authors: E. Hueichapan (UDP), B. Warwick, A. Kumar, M. Pursiainen, A. Sahu, D. O’Neill, D. Coppejans, J. Lyman, K. Ackley, M. Magee (Warwick), L. Galbany (IEEC/ICE-CSIC), P. Wiseman (Southampton), S. Srivastav (QUB), S. Benetti (INAF-OAPd), J. Sollerman (Stockholm), J. Anderson (ESO), T. Müller Bravo (Southampton), 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), S. J. Smartt (Oxford/QUB), K. W. Smith, M. Fulton (QUB), 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), A. Rest (STScI), C. Stubbs (Harvard), 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), M. McCollum, T. Moore, J. Weston (QUB), L. Shingles (GSI/QUB), L. Rhodes (Oxford), J. Sommer (LMU/QUB)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 4 Type Ia, 1 Type Ic-BL, 1 Type II supernovae, and 1 CV. Type Ia SN2023vqk exhibits strong C II 6580, which along with the high luminosity (M ~ -19.50 mag), is consistent with Super-Chandrasekhar SNe Ia.

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 2020arXiv200309052S) 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 2023 Oct 29, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) and GELATO (Harutyunyan et al. 2008 2008A&A...488..383H).

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 2023vjy [ATLAS23ukr] 21:36:48.181 -20:12:45.67 SN Ia 0.04 SNID template match shows a redshift of 0.04 and a phase of around +7 days. 21:36:48.181 -20:12:45.67 SN Ia 0.04
TNS 2023vey [PS23jnd] 04:59:33.729 -05:54:47.62 SN Ia 0.09 SNID template match shows a redshift of 0.09 and a phase of around +3 days. 04:59:33.729 -05:54:47.62 SN Ia 0.09
TNS 2023vqk [ATLAS23unb] 04:34:51.582 -73:05:47.34 SN Ia 0.07 Gelato provides template matches to Super-Chandrasekhar/03fg-like SNe Ia around maximum light at a redshift of 0.07 corresponding to M = -19.50 mag. The spectrum shows the presence of strong C II 6580, which along with the high luminosity, is consistent with Super-Chandrasekhar SNe Ia. 04:34:51.610 -73:05:47.36 SN Ia 0.07
TNS 2023upt [PS23jfu] 04:28:27.395 -17:53:27.16 SN Ia 0.06 SNID template match shows a redshift of 0.06 and a phase of around +10 days. 04:28:27.395 -17:53:27.16 SN Ia 0.06
TNS 2023vvw [ATLAS23ura] 22:50:09.188 -51:40:03.89 SN Ic-BL 0.05 SNID template matches Type Ic-BL supernovae around the max and shows an approximatre redshift of 0.05. 22:50:09.188 -51:40:03.89 SN Ic-BL 0.05
TNS 2023vln [XM122MZ] 20:47:32.670 +03:28:27.09 CV 0 The presence of Balmer absorption lines indicates that this source is likely of galactic origin. 20:47:32.670 +03:28:27.09 CV
TNS 2023uln [ATLAS23twh] 03:03:05.524 -34:44:43.52 SN II 0.05 Classified as Type II based on Hb and HeI 5876 P-cygni at about z=0.05. The light curve indicates a phase around +15d 03:03:05.524 -34:44:43.52 SN II 0.05

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