DRAFT
2025-02-11 15:19:36
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN..54....1G
ePESSTO+ spectroscopic classification of optical transients
Authors: J. Gillanders (Oxford), D. Magill, C. Angus (QUB), J. Tweddle, S. Srivastav (Oxford), S. Faris (Tel Aviv), M. Dennefeld (IAP), L. Galbany (ICE-CSIC), T.-W. Chen (NCU), J. Anderson (ESO), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), A. Horowicz, O. Yaron, E. Zimmerman (Weizmann), D. Young (QUB), 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), A. Aamer, M. Fulton, K. W. Smith, 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(QUB), P. Ramsden (QUB/Birmingham)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 4 Type Ia supernovae

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 2025 Feb 10, 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), 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 2025ayu [ATLAS25blm] 09:52:27.624 -69:31:40.73 SN Ia 0.071 WISEA J095227.40-693140.8 0.071203 at max redshift from NED 09:52:27.624 -69:31:40.73 SN Ia 0.071
TNS 2025bdl [ATLAS25bnj] 06:38:08.352 -40:02:34.75 SN Ia 0.06 -4 to 0 redshift from SNID 06:38:08.352 -40:02:34.75 SN Ia 0.06
TNS 2025ayp [ATLAS25blh] 07:16:47.355 -35:36:12.15 SN Ia 0.03 -7 to -4 redshift from SNID 07:16:47.355 -35:36:12.15 SN Ia 0.03
TNS 2025ais [GOTO25ug] 11:48:28.654 -53:53:10.45 SN Ia 0.06 +5 to +10 redshift from SNID, matches to Ia-norm and Ia-91T 11:48:28.654 -53:53:10.45 SN Ia 0.06

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