DRAFT
2025-01-27 15:22:56
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN..39....1W
ePESSTO+ spectroscopic classification of optical transients
Authors: S. de Wet, H. Wichern, G. Leloudas (DTU Space), S. Faris (TAU), T. Pessi (ESO), G. Pignata (UTA), C. Gutiérrez (IEEC/ICE-CSIC), J. Sollerman (OKC), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), P. Pessi (Stockholm), O. Yaron (Weizmann), D. Young (QUB), 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 5 Type Ia's and 1 Type Ibn

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) and by the Zwicky Transient Facility ZTF (Bellm et al. 2019 2019PASP..131a8002B).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2025 January 26, using EFOSC2 and Grism 11 (3380 - 7520A, 13A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B), GELATO (Harutyunyan et al. 2008 2008A&A...488..383H), 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 2025afh [ATLAS25ayb] 03:07:48.894 -04:15:36.98 SN Ia 0.031 Approximatly one week before peak 03:07:48.847 -04:15:36.85 SN Ia 0.031
TNS 2025ky [ZTF22ablqzpz] 10:02:49.869 -05:51:12.65 SN Ia 0.0828 Nuclear SN with significant host contamination. Around peak 10:02:49.869 -05:51:12.65 SN Ia 0.0828
TNS 2025afx [ATLAS25ayt] 06:59:15.857 -45:54:23.78 SN Ia 0.03 -10 to -7 days before peak 06:59:15.857 -45:54:23.78 SN Ia 0.03
TNS 2025hf [ZTF25aabmhdd] 12:29:16.826 +05:04:04.41 SN Ia 0.07 approximately 1 week post peak. Consistent with TNS Classification Report No. 20248 12:29:16.826 +05:04:04.41 SN Ia 0.07
TNS 2025aga [ATLAS25ayy] 13:55:17.405 -17:57:59.70 SN Ia 0.094 approximately 1 week post peak 13:55:17.409 -17:57:59.87 SN Ia 0.094
TNS 2025aft [ATLAS25ayo] 16:47:22.266 -73:01:54.13 SN Ibn 0.046 16:47:22.266 -73:01:54.13 SN Ibn 0.046

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