DRAFT
2026-09-10 14:58:22
Type: Object/s-Discovery/Classification
Bibcode: 2026TNSAN.272....1S
ePESSTO+ spectroscopic classification of optical transients
Authors: R. Seth, C. O'Donnell, J.H. Terwel, T.E. Müller Bravo (TCD), C. Gutiérrez (ICE-CSIC), A. Aryan (NCU), M. Ghendrih (Lancaster), A. Badash, A. Horowicz (Weizmann), J. Sollerman (SU), P. Charalampopoulos (ICE-CSIC), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), P. Pessi (Warsaw), O. Yaron (Weizmann), D. Young (QUB), E. Zimmerman (Weizmann), J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt, K. W. Smith (Oxford/QUB), S. Srivastav, H. Stevance (Oxford), D. R. Young, 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), T.-W. Chen (NCU), C. Stubbs (Harvard)
Source Group: ePESSTO+
Keywords: Spectroscopy, Transient, Supernova, Optical
Abstract:
This report includes classifications of 3 Type Ia's before or around peak brightness.

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 2020PASP..132h5002S), the Zwicky Transient Facility ZTF (Bellm et al. 2019 2019PASP..131a8002B) - data stream processed through the Lasair broker (Williams et al. 2024 2024RASTI...3..362W) and by the ALeRCE broker (Forster et al. 2020 2021AJ....161..242F) and by 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 2026 September 09, 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 2026zzb [GOTO26inx] 04:27:45.214 -33:37:20.62 SN Ia 0.0462 0.046239 Around peak z from host, phase from SNID 04:27:45.214 -33:37:20.62 SN Ia 0.0462
TNS 2026aaft [ZTF26abrqjrn] 00:19:11.851 -13:12:40.38 SN Ia 0.0548 0.054755 Around peak z from host, phase from SNID 00:19:11.863 -13:12:40.35 SN Ia 0.0548
TNS 2026aars [ZTF22abovhzu] 02:29:34.883 +23:06:58.44 SN Ia 0.03 GLADE41253 -7 z and phase from SNID 02:29:34.883 +23:06:58.44 SN Ia 0.03

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