DRAFT
2025-08-17 19:19:53
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.260....1M
ePESSTO+ spectroscopic classification of optical transients
Authors: Hao-Yu Miao, Ramon Sanfeliu, Caludia Gutiérrez, Lluís Galbany (ICE-CSIC/IEEC), Jesper Sollerman (Stockholm), Thallis de Lourenço Pessi (ESO), Sara Faris (Tel Aviv), 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)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes one classification of a Type Ia 91T-like.

ePESSTO+, the advanced Public ESO Spectroscopic Survey for Transient Objects (Smartt et al. 2015 2015A&A...579A..40S), reports the following supernova classifications.

The target was supplied by the ATLAS survey (Smith et al. 2020 2020PASP..132h5002S), officially discovered by the BlackGEM telescope array.

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2025 August 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 Source Phase (days) Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2025tqb [ATLAS25jjs] 22:50:36.887 -34:22:36.19 SN Ia-91T-like 0.03 WISEA J225036.83-342234.6 0.0296 pre-max Known host redshift 22:50:36.887 -34:22:36.19 SN Ia-91T-like 0.03
File Comments
pessto_20250817_06_33_Rapid_upload_1.txt

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