DRAFT
2025-07-24 16:16:42
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.228....1M
ePESSTO+ spectroscopic classification of optical transients
Authors: G. Martins, R. Santos (CENTRA-IST), S. González-Gaitán (ESO), J. Duarte (CENTRA-IST), C. Gutiérrez (IEEC/ICE-CSIC), P. Pessi (Stockholm), T. Kravtsov (Turku), J. Sollerman (Stockholm), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), 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), C. Stubbs (Harvard)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 15 Type Ia's, including 1 Ia-peculiar and 1 Ia-CSM, 1 Type Ib, 2 Type Ic, 1 Type IIb and 1 blue continuum.

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), the Gravitational-wave Optical Transient Observer GOTO (see Dyer et al. 2020, SPIE, 11445 2020SPIE11445E..7GD) and by the Wide Field Survey Telescope WFST (Wang et al. 2023 2023SCPMA..6609512W).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2025 July 23, 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) and 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 2025qst [ATLAS25hcq] 10:12:04.168 -42:02:50.30 SN IIb 0.02 HIPASSJ1011-42 0.02 Around peak Redshift from host. 10:12:04.168 -42:02:50.30 SN IIb 0.02
TNS 2025req [ATLAS25hqg] 11:39:46.056 -31:24:41.20 SN Ic 0.18 Around peak Redshift from spectral matching. 11:39:46.056 -31:24:41.20 SN Ic 0.18
TNS 2025rin [ATLAS25hsy] 13:02:52.653 -02:30:41.52 SN Ia 0.085 2MASXJ13025254-0230590 0.085 +10 to +12 Redshift from host. 13:02:52.661 -02:30:41.62 SN Ia 0.085
TNS 2025qim [WFST0650fdnz] 14:00:22.313 +04:38:00.10 SN Ia-CSM 0.116 SDSSJ140021.91%2B043757.8 0.116 Post peak Redshift from host. 14:00:22.305 +04:37:59.71 SN Ia-CSM 0.116
TNS 2025rge [ATLAS25hrq] 15:12:04.561 +06:02:49.65 SN Ia 0.079 2MASXJ15120449%2B0602491 0.079 Around peak Redshift from host. 15:12:04.561 +06:02:49.65 SN Ia 0.079
TNS 2025ruf [ATLAS25iao] 13:43:41.243 -22:16:28.15 SN Ia 0.055 2MASXJ13434116-2216298 0.055 -5 to -1 Redshift from host. 13:43:41.243 -22:16:28.15 SN Ia 0.055
TNS 2025rdc [ATLAS25hpm] 14:20:25.625 -28:38:48.60 SN Ia 0.065 +8 to +9 Redshift from host emission lines. 14:20:25.625 -28:38:48.60 SN Ia 0.065
TNS 2025rby [GOTO25evx] 18:17:06.321 -54:32:51.12 SN Ia 0.06 +3 to +6 Redshift from spectral matching 18:17:06.321 -54:32:51.12 SN Ia 0.06
TNS 2025rjb [ATLAS25hts] 20:32:12.614 -40:54:27.58 SN Blue continuum. 20:32:12.628 -40:54:27.71 SN
TNS 2025rku [GOTO25fbb] 22:09:30.163 -19:11:11.78 SN Ia 0.05 GALEXASCJ220930.03-191112.0 Around peak Redshift from spectral matching 22:09:30.163 -19:11:11.78 SN Ia 0.05
TNS 2025qqr [ZTF25abalshy] 22:47:31.435 -08:30:54.91 SN Ia 0.063 2MASXJ22473130-0830568 0.063 Post Max Redshift from host. 22:47:31.435 -08:30:54.91 SN Ia 0.063
TNS 2025rab [ATLAS25hog] 23:24:03.903 +08:48:10.11 SN Ib 0.01 SDSS J232404.0+084808.9 Around peak Redshift from spectral matching. 23:24:03.903 +08:48:10.11 SN Ib 0.01
TNS 2025rib [ATLAS25hrz] 01:17:12.602 -58:54:46.82 SN Ia 0.018 NGC 0466 0.018 Post Peak Redshift from host. 01:17:12.602 -58:54:46.82 SN Ia-91bg-like 0.01774
TNS 2025rak [ZTF25abbanem] 23:47:21.732 +19:55:05.65 SN Ia 0.095 SDSS J234721.45+195509.2 Around peak Redshift from spectral matching. 23:47:21.732 +19:55:05.65 SN Ia 0.095
TNS 2025rba [GOTO25euq] 02:39:33.566 -41:48:08.72 SN Ia 0.089 GALEXASCJ023933.63-414807.6 +5 to +8 Redshift from host emission lines. 02:39:33.566 -41:48:08.72 SN Ia 0.089
TNS 2025rob [ATLAS25hxs] 00:11:57.951 +21:46:29.78 SN Ia 0.08 SDSS J001157.93+214629.8 +5 to +8 Redshift from spectral matching. 00:11:57.955 +21:46:29.76 SN Ia 0.08
TNS 2025rbz [GOTO25ewb] 02:25:41.393 -23:17:42.61 SN Ia 0.053 2MASXJ02254232-2317439 0.053 +5 to +6 Redshift from host. 02:25:41.407 -23:17:42.66 SN Ia 0.053
TNS 2025qzq [GOTO25esz] 03:57:46.783 -58:46:36.01 SN Ia 0.06 0 to +3 Redshift from spectral matching. 03:57:46.783 -58:46:36.01 SN Ia 0.06
TNS 2025rij [ATLAS25hsq] 05:21:04.312 -62:09:24.61 SN Ic 0.04 Around peak Redshift from spectral matching. 05:21:04.312 -62:09:24.61 SN Ic 0.04
TNS 2025ris [ATLAS25hti] 05:26:06.563 -32:57:19.73 SN Ia 0.037 2MASXJ05260639-3257139 0.037 -3 to 0 Redshift from host. 05:26:06.582 -32:57:19.66 SN Ia 0.037

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