DRAFT
2025-09-20 12:59:55
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.287....1S
ePESSTO+ spectroscopic classification of optical transients
Authors: A. Sahu, B. Warwick, M. Pursiainen, M. Magee (Warwick), J. Sollerman (Stockholm), X. Sheng (QUB), Lluís Galbany (ICE-CSIC/IEEC), 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), E. Zimmerman (Weizmann), 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), T.-W. Chen (NCU), C. Stubbs (Harvard)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 1 Type Ia SN, and 1 ambiguous SN. The spectrum of SN2025xzc is dominated by host galaxy lines, but some broad SN-like line features are present.

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).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2025 September 19, 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 2025xeg [ATLAS25ldn] 07:56:26.814 -78:41:57.78 SN Ia 0.0157 0.0157 Redshift from NED. 07:56:26.814 -78:41:57.78 SN Ia 0.0157
TNS 2025xzc [ATLAS25lrk] 22:10:57.970 -25:04:30.27 SN 0.0169 0.0169 Redshift from NED. 22:10:57.968 -25:04:30.26 SN Ic 0.0169

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