DRAFT
2025-08-11 14:36:36
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.252....1D
ePESSTO+ spectroscopic classification of optical transients
Authors: J. N. D. van Dalen (Radboud), D. B. Malesani (DAWN/NBI Radboud), G. Corcoran (UCD) , L. Cotter (UCD), A. Martin-Carrillo (UCD), G. Pignata (UTA), A. Aryan (NCU, Taiwan) , M. Dennefeld (IAP), J. Sollerman (Stockholm), S. Srivastav (Oxford), J. Anderson (ESO), T. Müller Bravo (Southampton), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (QUB), O. Yaron (Weizmann), 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, J. Weston (QUB), L. Shingles (GSI/QUB), L. Rhodes (Oxford), J. Sommer (LMU/QUB), A. Rest (STScI), C. Stubbs (Harvard)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifcations of 10 Type Ia's and a CV.

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 (Smith, Williams, Young et al. 2019 2019RNAAS...3...26S) and by the ALeRCE broker (Forster et al. 2020 2021AJ....161..242F) 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 2025 August 10, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) 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 2025thx [ATLAS25jdm] 19:14:42.977 -58:53:53.13 SN Ia 0.056 Redshift from host 19:14:42.977 -58:53:53.13 SN Ia 0.056
TNS 2025tkl [ATLAS25jer] 21:11:23.918 -80:50:33.37 SN Ia 0.029 Redshift from host 21:11:23.918 -80:50:33.37 SN Ia 0.029
TNS 2025svc [ATLAS25iqu] 15:50:04.958 -20:41:40.95 SN Ia 0.104 Redshift from SNID 15:50:04.958 -20:41:40.95 SN Ia 0.104
TNS 2025thh [GOTO25fqt] 22:49:31.453 -63:28:07.96 SN Ia 0.071 Redshift from SNID 22:49:31.536 -63:28:07.93 SN Ia 0.071
TNS 2025ter [ATLAS25jao] 19:18:40.066 -34:55:08.11 SN Ia 0.016 Redshift from SNID 19:18:40.028 -34:55:08.30 SN Ia 0.016
TNS 2025tgv [GOTO25fqp] 23:42:10.715 -64:51:17.16 SN Ia 0.069 Redshift from host 23:42:10.715 -64:51:17.16 SN Ia 0.069
TNS 2025sxe [ATLAS25itb] 03:02:17.405 -02:29:52.18 SN Ia 0.068 Redshift from host 03:02:17.432 -02:29:52.02 SN Ia 0.068
TNS 2025tgr [ATLAS25jbx] 04:45:47.212 -51:30:52.32 SN Ia 0.065 Redshift from SNID 04:45:47.212 -51:30:52.32 SN Ia 0.065
TNS 2025swg [ATLAS25isd] 03:39:18.662 -04:37:07.84 SN Ia 0.068 Redshift from SNID 03:39:18.633 -04:37:08.21 SN Ia 0.068
TNS 2025sxk [ATLAS25itj] 03:44:53.051 +04:03:01.18 SN Ia 0.037 Redshift from SNID 03:44:53.043 +04:03:01.35 SN Ia 0.037
TNS 2025tfv [ZTF25abhfslz] 18:42:31.185 +17:47:33.22 CV 0 Blue continuum, no obvious host, in the Galactic plane and short rise followed by decline together indicate foreground CV 18:42:31.185 +17:47:33.22 CV

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