DRAFT
2025-06-17 19:06:18
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.186....1P
ePESSTO+ spectroscopic classification of optical transients
Authors: P. J. Pessi (SU), E. Concepcion (UNG), M. Gromadzki (Warsaw), N. Ihanec (ING, Warsaw), G. Pignata (UTA), M. Dennefeld (IAP), L. Galbany (ICE-CSIC), S.Srivastav(Oxford/QUB),J. Anderson (ESO), T.-W. Chen (NCU), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), P. Pessi (Stockholm), 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: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 7 Type Ia's, 5 Type II's., 1 Type Ic, 2 featurless SN, a CV and a Nova. 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 Gravitational-wave Optical Transient Observer GOTO (see Dyer et al. 2020, SPIE, 11445 2020SPIE11445E..7GD) and by MASTER (see http://observ.pereplet.ru/ ; Lipunov et al. 2004, AN, 325, 580).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2025 June 16, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) and  GELATO (Harutyunyan et al. 2008 2008A&A...488..383H).

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 Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2025jyz [ATLAS25euu] 00:33:26.729 -67:45:03.80 SN II 0.026 redshift measured from emission lines 00:33:26.729 -67:45:03.80 SN II 0.026
TNS 2025mlo [ATLAS25fsq] 23:19:55.198 -71:32:14.62 SN II 0.06 featurless continuum 23:19:55.198 -71:32:14.62 SN II 0.06
TNS 2025mqf [ATLAS25fun] 22:31:27.238 -45:08:45.62 SN IIn 0.115 redshift measured from emission lines 22:31:27.238 -45:08:45.62 SN IIn 0.115
TNS 2025msq [ATLAS25fvq] 01:26:30.611 -39:39:44.03 SN 0.099 redshift measured from emission lines 01:26:30.611 -39:39:44.03 SN 0.099
TNS 2025mzi [ATLAS25fyd] 09:08:44.516 -38:36:05.87 SN II 0.014 redshift measured from emission lines 09:08:44.516 -38:36:05.87 SN II 0.014
TNS 2025mzk [ATLAS25fye] 16:59:30.416 -33:49:59.64 SN Ia 0.05 redshift determined with SNID 16:59:30.416 -33:49:59.64 SN Ia 0.05
TNS 2025nbm [ATLAS25fyz] 01:56:34.339 -43:18:16.16 SN Ia 0.09 redshift determined with SNID 01:56:34.339 -43:18:16.16 SN Ia 0.09
TNS 2025nki [ATLAS25gca] 13:09:56.690 -33:34:47.72 SN Ia 0.08 redshift determined with SNID 13:09:56.690 -33:34:47.72 SN Ia 0.08
TNS 2025nlf [GOTO25dlm] 22:51:08.623 -76:22:38.67 SN Ia 0.063 redshift determined from host emission lines 22:51:08.623 -76:22:38.67 SN Ia 0.063
TNS 2025nlv [GOTO25dlq] 01:47:09.560 -81:11:40.94 SN Ia-pec 0.09 redshift determined with SNID 01:47:09.560 -81:11:40.94 SN Ia-pec 0.09
TNS 2025nlx [ATLAS25gcf] 11:13:45.902 -34:03:10.31 SN II 0.022 redshift determined from emission host lines 11:13:45.902 -34:03:10.31 SN II 0.022
TNS 2025nmx [GOTO25dmu] 13:34:35.591 -35:20:51.44 SN Ic 0.046 redshift determined from host emission lines 13:34:35.591 -35:20:51.44 SN Ic 0.046
TNS 2025nmy [GOTO25dmv] 12:59:19.526 -32:32:43.95 SN Ia 0.095 redshift determined with SNID 12:59:19.544 -32:32:44.41 SN Ia 0.095
TNS 2025nna [GOTO25dmw] 13:07:42.090 -33:33:21.92 SN 0.047 featureless blue continuum, redshift from NED 13:07:42.090 -33:33:21.92 SN 0.047
TNS 2025nnc [GOTO25dnd] 14:11:49.262 -32:05:32.02 SN Ia 0.133 redshift determined with SNID 14:11:49.262 -32:05:32.02 SN Ia 0.133
TNS 2025nok [ATLAS25gds] 13:24:57.739 -43:01:42.56 Nova 0.002 blue continuum Balmer lines in absorption, possibly in the NGC5128 13:24:57.732 -43:01:42.68 Nova 0.002
TNS 2025neg [MASTER OT J123453.52-483804.6] 12:34:53.520 -48:38:04.60 CV 0 object in crowded galactic field, blue continuum 12:34:53.520 -48:38:04.60 CV
TNS 2025nab [GOTO25djs] 20:33:44.469 -49:13:54.29 target not visible in 60s acquisition image 20:33:44.469 -49:13:54.29

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