DRAFT
2026-05-04 11:11:38
Type: Object/s-Discovery/Classification
Bibcode: 2026TNSAN.120....1K
ePESSTO+ spectroscopic classification of optical transients
Authors: J. Khaulsay (Cardiff), C. Cárdenas (UA), C. Gutiérrez (ICE-CSIC), T. Kravtsov (UTU), A. Reguitti (INAF), A. Sankar.K, A. Dutta, A. Aryan, T.-W Chen (NCU), J. Anderson (ESO), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (UTU), T. Müller Bravo (Trinity), P. Pessi (Warsaw), O. Yaron (Weizmann), D. R. Young (QUB), J. Sollerman (Stockholm), Giorgos Leloudas (DTU Space), J. Johansson (Stockholm), 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), 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)
Source Group: ePESSTO+
Keywords: Astronomical Databases, Spectroscopy, Transient, Supernova, Optical
Abstract:
This report includes classifications of 6 Type Ia's, 1 Type II and 1 SLSN-II. We encourage followup observations.

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 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 May 2, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution) and Grism 11 (3380-7520A, 16A resolution). Classifications were done using SNID-SAGE (Stoppa F., Smartt S.~J., 2026, arXiv, arXiv:2603.28741. doi:10.48550/arXiv.2603.28741) and DASH (Muthukrishna et al. 2019  2019ApJ...885...85M).

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 2026kyo [GOTO26eax] 10:06:04.967 -33:53:05.07 SN II 0.03 Redhsift from ASTRODASH and SNID-SAGE. 10:06:04.967 -33:53:05.07 SN II 0.03
TNS 2026koy [ATLAS26euf] 08:07:33.956 -66:51:42.96 SN Ia 0.08 Rising Redshift from ASTRODASH and SNID-SAGE. 08:07:33.956 -66:51:42.96 SN Ia 0.08
TNS 2026hdx [ZTF26aaogioe] 13:45:25.925 +29:13:38.77 SLSN-II 0.154 SDSS J134525.91+291338.2 Rising Redshift from H lines in the SN spectrum. Rising since 50 days. It currently has M_g ~ -21.3 mag. 13:45:25.925 +29:13:38.77 SLSN-II 0.154
TNS 2026kit [ATLAS26epr] 14:20:16.540 +09:56:08.55 SN Ia 0.08 SDSS J142016.52+095607.1 Around peak Appears Type Ia-03fg-like due to 20days rise and M_o ~ -19.5 mag. Redshift from SNID-SAGE and ASTRODASH. 14:20:16.540 +09:56:08.55 SN Ia 0.08
TNS 2026kne [ATLAS26ere] 17:52:14.690 -78:03:43.36 SN Ia 0.06 Around peak Redshift from ASTRODASH and SNID-SAGE. Extended faint host in LS-DR10 (Objid: 3258). 17:52:14.690 -78:03:43.36 SN Ia 0.06
TNS 2026kis [ATLAS26epq] 21:00:10.757 -32:17:05.00 SN Ia 0.03 Around Peak Redshift from ASTRODASH and SNID-SAGE. Faint host in LS-DR10 (Objid: 2365). 21:00:10.759 -32:17:04.84 SN Ia 0.03
TNS 2026kfb [ATLAS26enz] 21:44:51.569 -55:12:16.86 SN Ia 0.04 Post peak Redshift from ASTRODASH and SNID-SAGE. Irregular host from LS-DR9. 21:44:51.569 -55:12:16.86 SN Ia 0.04
TNS 2026kyj [ATLAS26exq] 23:11:33.607 -50:49:14.02 SN Ia 0.04 Post peak Redshift from ASTRODASH and SNID-SAGE. Extended host galaxy from LS-DR9. 23:11:33.607 -50:49:14.02 SN Ia 0.04

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