DRAFT
2025-01-05 16:22:27
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN...4....1R
ePESSTO+ spectroscopic classification of optical transients
Authors: M. Ramirez, B. Ayala, R. Dastidar (UNAB), A. Kumar (RHUL/Warwick), T. Kravtsov (UTU), L. Galbany (CSIC), I. Arcavi (TAU), M. Fulton (QUB), P. Charalampopoulos (UTU), J. Sollerman (Stockholm), E. Zimmerman, A. Horowicz (Weizmann), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), M. Nicholl (QUB), O. Yaron (Weizmann), D. Young (QUB), P. Pessi (Stockholm), J. Tonry, L. Denneau, H. Weiland, A. Lawrence, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt (Oxford/QUB), K. W. Smith, S. Srivastav, M. McCollum, T. Moore, J. Weston (QUB), L. Shingles (GSI/QUB), L. Rhodes (Oxford), J. Sommer (LMU/QUB), A. Rest (STScI), C. Stubbs (Harvard), X. Sheng, A. Aamer, C. R. Angus, D. Magill (QUB), P. Ramsden (QUB/Birmingham)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 3 Type Ia's, 1 Type IIb, 1 Type II and 1 SN. We encourage follow-up 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 (Smith, Williams, Young et al. 2019 2019RNAAS...3...26S) and by the ALeRCE broker (Forster et al. 2020 2021AJ....161..242F) and by 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 January 4, 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 2024aeom [ZTF24abyjmya] 06:13:57.370 -14:43:23.78 SN Ia 0.089 +4 Redshift and phase are from spectral matching with SNID. 06:13:57.370 -14:43:23.78 SN Ia 0.089
TNS 2024aewc [ATLAS24rto] 11:42:48.876 +09:54:00.62 SN Ia 0.107 SDSS J114249.47+095427.9 +6 Redshift and phase are from spectral matching with SNID. 11:42:48.876 +09:54:00.62 SN Ia 0.107
TNS 2024aezi [GOTO24jiy] 10:35:20.860 -08:01:25.37 SN Ia 0.097 J103520.73-080124 +1 Redshift and phase are from spectral matching with SNID. 10:35:20.852 -08:01:25.36 SN Ia 0.097
TNS 2024abbx [ZTF24abrumcf] 03:14:35.787 +03:44:31.33 SN 0.103 SDSS J031435.68+034427.3 Redshift from host galaxy emission lines. The spectrum shows galaxy emission lines but lacks a blue continuum or broad components. 03:14:35.787 +03:44:31.33 SN 0.103
TNS 2024agji [ATLAS24sda] 12:58:20.963 -11:10:02.78 SN II 0.016 J12582121-1109590 0.016 Redshift from host galaxy emission lines. 12:58:20.957 -11:10:02.17 SN II 0.016
TNS 2024afpg [ATLAS24rzf] 10:42:12.470 +23:44:51.56 SN IIb 0.012 UGC05825 0.0116 -11 Redshift from NED. See also previous discovery (AstroNote 2024-393) and classification (2024-394) reports. 10:42:12.470 +23:44:51.50 SN IIb 0.012

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