DRAFT
2025-07-13 18:47:41
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.210....1Q
ePESSTO+ spectroscopic classification of optical transients
Authors: J. Quirola-Vásquez, J. Sánchez-Sierras (Radboud), K. Maguire, T. Müller Bravo (Trinity), D. O'Neill (Warwick), L. Galbany (ICE Barcelona), J. Sollerman (Stockholm), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), P. Pessi (Stockholm), O. Yaron, A. Horowicz (Weizmann), D. Young (QUB)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of a Ia-CSM and a SN Ia.

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 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 20250712, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) and SNID SAGE (https://github.com/FiorenSt/SNID-SAGE).

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 Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2025nfb [ATLAS25gag] 02:09:26.097 -71:26:44.91 SN Ia-CSM 0.059 Best match to a Ia-CSM with Halpha FWHM of ~1,600 km/s and consistent with ~40 day rising light curve and absolute magnitude in ATLAS o band of approx. -20 mag. 02:09:26.097 -71:26:44.91 SN Ia-CSM 0.059
TNS 2025ple [ATLAS25gra] 02:06:46.071 -60:43:51.79 SN Ia 0.0228 2MFGC 01629 0.022829 Best match is SN Ia SN 2003cg at +10 days 02:06:46.071 -60:43:51.79 SN Ia 0.0228

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