DRAFT
2026-06-08 16:36:09
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: E. Charleton (Southampton), M. Ghendrih (Lancaster), C.G. Touchard-Paxton (Trinity), P. Clark, M. Quilt, C. Dashwood Brown (Southampton), T. Petrushevska (Nova Gorica), T. Kravtsov (Turku), D. Magill (QUB), J. Sollerman (Stockholm), S. Srivastav (Oxford), J. Anderson (ESO), O. Yaron (Weizmann), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), P. Pessi (Warsaw), D. Young (QUB), 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), 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: Spectroscopy, Transient, Supernova, Optical
Abstract:
This report includes classifications of 6 Type Ia SNe and 3 Type II SNe

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 Wide Field Survey Telescope WFST (Tinguu et al. 2023 Science with the 2.5-meter Wide Field Survey Telescope (WFST) - Astrophysics Data System), the ATLAS survey (Smith et al. 2020 2020PASP..132h5002S) and 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).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2026 June 7, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID-SAGE (Stoppa F., Smartt S.~J., 2026, arXiv, arXiv:2603.28741. doi:10.48550/arXiv.2603.28741).

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 2026itn [WFST260319bveen] 14:50:11.607 +24:19:29.88 SN IIn 0.033 SDSS J145011.60+241929.8 0.033 WFST Post peak Redshift from host in SDSS. Phase from SNID-SAGE. 14:50:11.607 +24:19:29.88 SN IIn 0.033
TNS 2026ofe [ATLAS26gqz] 12:30:13.634 -26:03:03.53 SN II 0.02 ATLAS Pre-peak Classification in agreement with POISE: https://www.wis-tns.org/object/2026ofe/classification-cert . Redshift and phase from SNID-SAGE and ATLAS light curve. 12:30:13.634 -26:03:03.53 SN II 0.02
TNS 2026oig [ATLAS26gsn] 13:26:55.466 -31:25:25.91 SN Ia 0.044 2MASXJ13265599-3125269 0.04381 ATLAS Pre-peak Redshift from host in 6dF. Phase from SNID-SAGE and ATLAS light curve. 13:26:55.466 -31:25:25.91 SN Ia 0.044
TNS 2026ocs [ZTF26aazbfav] 14:12:50.850 -07:42:05.21 SN Ia 0.07 ZTF Pre-peak Redshift and phase from SNID-SAGE. 14:12:50.848 -07:42:05.42 SN Ia 0.07
TNS 2026ocz [ZTF26aazknmk] 15:17:39.666 -24:55:07.62 SN Ia-91T-like 0.043 ZTF Pre-peak Classification in agreement with GeminiClass: https://www.wis-tns.org/object/2026ocz/classification-cert.Redshift from SNID-SAGE in agreement with that previously reported. Phase is from SNID-SAGE. 15:17:39.666 -24:55:07.62 SN Ia-91T-like 0.043
TNS 2026oed [ZTF19adgymjn] 17:25:39.755 +21:57:18.90 SN Ia 0.055 WISEA J172539.78+215719.1 0.054901 ZTF Pre-peak Redshift from host in NED. Phase from SNID-SAGE. 17:25:39.755 +21:57:18.90 SN Ia 0.055
TNS 2026ohy [ZTF26aazuwhc] 16:47:56.788 -25:01:44.41 SN Ia 0.018 ESO 518- G 004 0.018429 ZTF Pre-peak Redshift from host in NED. Phase from SNID-SAGE. 16:47:56.788 -25:01:44.41 SN Ia 0.018429
TNS 2026ndn [ATLAS26gce] 16:35:04.502 -82:48:31.63 SN Ia 0.07 ATLAS Post-peak Redshift and phase from SNID-SAGE. 16:35:04.502 -82:48:31.63 SN Ia 0.07
TNS 2026nfw [ZTF26aaxnldg] 20:41:11.858 +07:30:47.01 SN 0.05 ZTF Post-peak Redshift and phase from SNID-SAGE. Type uncertain, possibly Type II. Absolute magnitude is ~ -18 using recent public ZTF photometry. 20:41:11.858 +07:30:47.01 SN 0.05

Comments