DRAFT
2026-09-08 15:16:38
Type: Object/s-Discovery/Classification
Bibcode: 2026TNSAN.270....1S
ePESSTO+ spectroscopic classification of optical transients
Authors: R. Seth, C. O'Donnell, U. Burgaz, C.G. Touchard-Paxton (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), T. Müller Bravo (Trinity), 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 4 Type Ia's, 1 Type II, and 1 host dominated spectrum. 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 by the ALeRCE broker (Forster et al. 2020 2021AJ....161..242F), 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 07, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B), GELATO (Harutyunyan et al. 2008 2008A&A...488..383H), Superfit (Howell et al. 2005 2005ApJ...634.1190H) and NGSF (Next Generation SuperFit; AstroNote 2022-191, 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 2026aabs [GOTO26ipg] 01:18:28.460 -27:05:47.26 SN Ia 0.06 At max Redshift and phase from SNID 01:18:28.494 -27:05:47.43 SN Ia 0.06
TNS 2026aaka [GOTO26isn] 02:32:32.802 -10:05:23.31 SN Ia 0.06 At max Redshift and phase from SNID 02:32:32.814 -10:05:23.40 SN Ia 0.06
TNS 2026zvc [ATLAS26knm] 06:00:27.278 -27:32:25.07 SN Ia 0.06 +7d Redshift and phase from SNID 06:00:27.278 -27:32:25.07 SN Ia 0.06
TNS 2026zjk [ATLAS26kkf] 06:24:35.385 -13:29:11.88 SN II 0.01 At max Redshift and phase from SNID 06:24:35.378 -13:29:11.85 SN II 0.01
TNS 2026aarv [ATLAS26kvd] 23:27:27.505 -35:48:44.27 SN Ia 0.0921 0.0921 At max phase from SNID 23:27:27.505 -35:48:44.27 SN Ia 0.0921
TNS 2026aarq [ZTF26abrpyjq] 23:45:32.672 -04:49:25.28 Other 0.0757 0.0757 Host dominated spectrum. Redshift from host. 23:45:32.672 -04:49:25.28 0.0757

Comments