AstroNote 2024-336

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DRAFT

2024-11-14 17:53:38

Type: Object/s-Discovery/Classification

Bibcode: 2024TNSAN.336....1P

ePESSTO+ spectroscopic classification of optical transients

Authors: P. J. Pessi, K. Tsalapatas, Y. Hu, A. Gkini, A. Singh, A. Gangopadhyay, J. Sollerman (SU) , M. Dennefeld (IAP), T-W, Chen (NCU), J. Anderson (ESO), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), O. Yaron (Weizmann), D. Young (QUB), E. Zimmerman (Weizmann), 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. 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 2 Type Ia SNe, 2 Type II SNe and 1 SLSN-II.

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 by 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 2024 Nov 13, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution) and 11 (3380-7520A, 16A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) 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.

Related Objects: Show current TNS values

Catalog	Name	Reported RA	Reported DEC	Reported Obj-Type	Reported Redshift	Host Name	Remarks	TNS RA	TNS DEC	TNS Obj-Type	TNS Redshift
TNS	2024zqt [GOTO24hpm]	22:03:17.887	-71:06:10.59	SN II	0.06	WISEA J223637.35-474654.1	Best match with Type II. Redshift from NGSF.	22:03:17.887	-71:06:10.59	SN II	0.06
TNS	2024yws [ATLAS24pno]	23:57:57.860	-51:31:39.32	SLSN-II	0.134	WISEA J235757.84-513138.6	Redshift is estimated from host lines. The current o band magnitude of 18.7 gives us an absolute magnitude of -20.3 for the measured redshift placing the transient in SLSN category.	23:57:57.860	-51:31:39.32	SLSN-II	0.134
TNS	2024aayt [ATLAS24qdl]	05:36:07.234	-29:38:24.51	SN Ia	0.04	6dFGS gJ053607.1-293818	Our classification is consistent with TNS Classification Report No. 18690.	05:36:07.234	-29:38:24.51	SN Ia	0.04
TNS	2024xti [GOTO24haa]	05:35:26.932	-28:44:27.42	SN II	0.07	LEDA 738026	Best match with Type II. Redshift from SNID.	05:35:26.932	-28:44:27.42	SN II	0.07
TNS	2024aaru [GOTO24icl]	04:10:08.119	-65:50:31.73	SN Ia	0.06	LEDA 309722	Best match with Type Ia. Redshift from SNID.	04:10:08.119	-65:50:31.73	SN Ia	0.06

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