AstroNote 2024-344

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DRAFT

2024-11-21 16:31:09

Type: Object/s-Discovery/Classification

Bibcode: 2024TNSAN.344....1T

ePESSTO+ spectroscopic classification of optical transients

Authors: A. Townsend (HU-Berlin), C. Gutiérrez (IEEC/ICE-CSIC), A. Aryan, A. Sankar.K, T.-W. Chen, C.-H. Lai, Y.-H. Lee (NCU), R. Santos, J. Duarte, S. González-Gaitán (CENTRA-IST), J. Anderson (ESO), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), O. Yaron (Weizmann), D. R. Young (QUB), E. Zimmerman, A. Horowicz (Weizmann), I. Arcavi (TAU), G. Leloudas (DTU), P. Jonker (Radboud), M. Nicholl (QUB), J. Sollerman (SU), S. Benetti (INAF), P. Charalampopoulos (Univ. Turku), 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 1 Type Ia, 1 Type II, 1 Type IIn, 1 TDE and 1 CV. 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 ATLAS survey (Smith et al. 2020 2020PASP..132h5002S).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2024 Nov 20, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution) and Grism 11 (3380-7520A, 16A resolution). Classifications were done using GELATO (Harutyunyan et al. 2008 2008A&A...488..383H) and DASH (Muthukrishna et al. 2019 2019ApJ...885...85M).

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	Host Redshift	Phase (days)	Remarks	TNS RA	TNS DEC	TNS Obj-Type	TNS Redshift
TNS	2024abla [ATLAS24qfw]	03:50:18.947	-47:46:57.96	SN Ia	0.06	WISEA J035019.02-474706.2		-5	Best match with Type Ia. Redshift and phase from GELATO.	03:50:18.947	-47:46:57.96	SN Ia	0.06
TNS	2024able [ATLAS24qga]	01:19:26.508	-51:51:14.81	SN II	0.031	WISEA J011926.57-515114.6	0.031	+6	Best match with Type II. Redshift obtained from NED of the host galaxy. Phase from GELATO.	01:19:26.510	-51:51:15.05	SN II	0.031
TNS	2024ablc [ATLAS24qfy]	23:03:13.162	-53:08:12.60	CV					Blue continuum, Balmer absorption at z=0.0.	23:03:13.162	-53:08:12.60	CV
TNS	2024abmf [ATLAS24qgo]	02:01:30.971	-17:15:53.80	SN IIn	0.08	SDSS J020131.08-171554.1		+12	Best match with Type IIn. Redshift and phase from GELATO.	02:01:30.990	-17:15:54.18	SN IIn	0.08
TNS	2024ablg [ATLAS24qgc]	05:44:09.777	-51:24:41.06	TDE	0.052	WISEA J054409.99-512442.6			Tentative TDE classification, based on possible broad He II emission on top of a blue continuum. Several host galaxy lines like [O II], [O III] and H-alpha are detected. The redshift from these host lines is 0.052	05:44:09.777	-51:24:41.06	TDE	0.052

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