DRAFT
2025-07-23 16:27:24
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.225....1S
ePESSTO+ spectroscopic classification of optical transients
Authors: R. Santos, G. Martins, J. Duarte (CENTRA-IST), S. González-Gaitán (ESO), T. Kravtsov (Turku), C. Gutiérrez (IEEC/ICE-CSIC), P. Pessi, J. Sollerman (Stockholm), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), O. Yaron (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), C. Stubbs (Harvard)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 7 Type Ia's and 1 SN (Blue continuum with narrow emission Halpha line).

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), 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), 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 2025 July 22, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B), GELATO (Harutyunyan et al. 2008 2008A&A...488..383H), and Superfit (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 2025quo [ATLAS25hmh] 13:01:47.508 +01:29:35.23 SN Ia 0.07 0 to +3 Redshift from spectral Matching 13:01:47.495 +01:29:35.57 SN Ia 0.07
TNS 2025rjo [ATLAS25huj] 13:26:35.754 -30:59:35.59 SN 0.048 GALEXASCJ132635.63-305936.5 0.048 pre max Blue continuum with narrow emission Halpha line; Redshift from host 13:26:35.754 -30:59:35.59 SN II 0.048
TNS 2025rjk [ATLAS25huc] 14:08:33.428 -43:11:25.52 SN Ia 0.07 Around peak Redshift from spectral Matching 14:08:33.428 -43:11:25.52 SN Ia 0.07
TNS 2025rla [ZTF25abbsaee] 17:58:22.187 +14:03:20.37 SN Ia 0.05 Around peak Redshift from spectral Matching 17:58:22.178 +14:03:20.45 SN Ia 0.05
TNS 2025riz [ATLAS25htp] 19:21:29.977 -44:05:12.16 SN Ia 0.05 +2 to +4 Redshift from spectral Matching 19:21:29.977 -44:05:12.16 SN Ia 0.05
TNS 2025rqh [ATLAS25hyx] 22:53:01.950 -76:00:48.92 SN Ia 0.08 +1 to +5 Redshift from spectral Matching 22:53:01.950 -76:00:48.92 SN Ia 0.08
TNS 2025rgk [GOTO25exu] 00:01:38.379 -52:37:16.01 SN Ia 0.03 -5 to -1 Redshift from spectral Matching 00:01:38.379 -52:37:16.01 SN Ia 0.03
TNS 2025rpt [ATLAS25hyl] 01:54:21.510 -02:37:07.74 SN Ia 0.019 KUG0151-028B 0.019 -6 to -1 Redshift from host 01:54:21.518 -02:37:08.00 SN Ia 0.019

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