DRAFT
2025-07-16 16:07:58
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.215....1Q
ePESSTO+ spectroscopic classification of optical transients
Authors: J. Quirola-Vásquez, J. Sánchez-Sierras (Radboud), U. Burgaz, J.H. Terwel (Trinity), D. O'Neill (Birmingham), L. Galbany (ICE Barcelona), J. Sollerman (Stockholm), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), P. Pessi (Stockholm), A. Horowicz, 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), 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 5 Type Ia's, 1 Type Ia-91T, 3 Type II's, and 1 Galaxy spectrum.

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 July 15, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B).

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 2025qgd [ATLAS25gxg] 10:27:51.066 -43:54:20.96 SN II 0.009354 NGC 3256 0.009354 +7 Best snid matches to type II 10:27:51.066 -43:54:20.96 SN II 0.009354
TNS 2025lwx [ATLAS25fiy] 21:28:22.795 -23:53:58.89 SN II 0.06 +7 best matches to type II, z from snid 21:28:22.795 -23:53:58.89 SN II 0.06
TNS 2025qaz [ZTF25aayxhar] 20:50:27.269 -23:20:48.07 SN Ia 0.1 -7 best matches to type Ia, z from snid 20:50:27.269 -23:20:48.07 SN Ia 0.1
TNS 2025qpv [ZTF25abakvtg] 21:30:58.771 +22:32:29.50 SN Ia 0.0456 2MASX J21305895+2232313 0.045593 +6 best matches to type Ia, z from host 21:30:58.771 +22:32:29.50 SN Ia 0.0456
TNS 2025qzm [GOTO25esx] 00:45:32.097 -26:33:30.90 SN II 0.0227 IC 1579 0.0227 +1 best matches to type II, z from host 00:45:32.117 -26:33:30.79 SN II 0.0227
TNS 2025qoy [ATLAS25hbp] 03:43:55.871 -20:31:46.73 SN Ia 0.0405 PGC 840447 0.0405 +3 best matches to Ia, z from host, host in slit 03:43:55.887 -20:31:46.83 SN Ia 0.0405
TNS 2025qha [ATLAS25gzg] 04:21:40.657 -53:21:39.13 SN Ia 0.0424 2MASX J04214146-5321315 0.042443 -4 best matches to Ia, z from host 04:21:40.657 -53:21:39.13 SN Ia 0.0424
TNS 2025qhb [ATLAS25gzh] 05:02:24.017 -47:58:41.57 SN Ia-91T-like 0.06 +3 Best matches Ia-91T, z from snid 05:02:24.017 -47:58:41.57 SN Ia-91T-like 0.06
TNS 2025qpo [GOTO25eqw] 20:26:29.119 -57:19:13.94 SN Ia 0.0574 LEDA 162377 0.05736 +4 best matches to Ia, z from host 20:26:29.148 -57:19:14.21 SN Ia 0.0574
TNS 2025qqa [GOTO25ero] 05:11:43.103 -42:26:38.86 Galaxy 0.052 0.052046 05:11:43.103 -42:26:38.86 Galaxy 0.052

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