DRAFT
2025-01-28 14:46:35
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN..40....1W
ePESSTO+ spectroscopic classification of optical transients
Authors: H. Wichern, S. de Wet, G. Leloudas (DTU Space), S. Faris (TAU), T. Pessi (ESO), G. Pignata (UTA), E. Zimmerman (Weizmann), J. Sollerman (OKC), 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 classifications of 3 Type Ia's and 1 young core-collapse SN.

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), 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 January 27, using EFOSC2 and Grism 11 (3380 - 7520A, 13A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B), GELATO (Harutyunyan et al. 2008 2008A&A...488..383H), Superfit (Howell et al. 2005 2005ApJ...634.1190H) and NGSF (Next Generation SuperFit; AstroNote 2022-191, 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 2025agp [GOTO25sb] 09:13:49.054 +17:44:28.12 SN II 0.0294 Young SN with blue continuum and superimposed blueshifted He II. Redshift from NED. 09:13:49.063 +17:44:28.20 SN II 0.0294
TNS 2025ib [ZTF25aabmbjx] 09:24:27.126 +17:30:50.71 SN Ia 0.117 SDSS J092427.12+173050.9 About 1 week post peak 09:24:27.126 +17:30:50.71 SN Ia 0.117
TNS 2025np [ZTF25aacalpc] 08:52:15.836 +03:02:44.18 SN Ia 0.1 Approximately 10 days past maximum 08:52:15.836 +03:02:44.18 SN Ia 0.1
TNS 2025aes [GOTO25pp] 13:30:38.376 -34:58:10.30 SN Ia 0.05 Pre-max 13:30:38.376 -34:58:10.30 SN Ia 0.05

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