DRAFT
2025-01-17 18:46:31
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: I. Salmaso, F. Ragosta, R. Carini, S. Benetti, A. Melandri (INAF), T. Killestein (Turku Univ.), L. Galbany (ICE-CSIC), A. Aryan (NCUIA), 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+
Abstract:
This report includes classifications of 2 Type Ia's and 1 Type II. We encourage followup 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 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), the Gravitational-wave Optical Transient Observer GOTO (see Dyer et al. 2020, SPIE, 11445 2020SPIE11445E..7GD) and the Xingming Sky Survey Project (XOSS).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2025 January 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 2025av [KATS25A005] 07:11:46.434 +24:02:13.24 SN Ia 0.07 around max Redshift from SNID 07:11:46.434 +24:02:13.24 SN Ia 0.07
TNS 2025iw [GOTO25fv] 13:30:58.388 -21:50:45.98 SN II 0.0243 Classification from Gelato. Redshift from NED. 13:30:58.352 -21:50:46.40 SN II 0.0243
TNS 2025kj [ZTF25aabreke] 14:10:39.017 -05:53:34.93 SN Ia 0.04 LCRS B140801.7-053930 around max Redshift from SNID 14:10:39.017 -05:53:34.93 SN Ia 0.04

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