DRAFT
2024-11-30 14:27:52
Type: Object/s-Discovery/Classification
Bibcode: 2024TNSAN.351....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 (NCU), S. Faris (TAU), T. Petrushevska (UNG), T. Killestein (UTU), J. Anderson (ESO), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), Priscila J. Pessi (OKC), T. Müller Bravo (Trinity), O. Yaron (Weizmann), D. R. Young (QUB), E. Zimmerman, A. Horowicz (Weizmann), J. Sollerman (OKC), 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, 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), the Zwicky Transient Facility ZTF (Bellm et al. 2019 2019PASP..131a8002B) - data stream processed by the ALeRCE broker (Forster et al. 2020 2021AJ....161..242F and also processed through the Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3...26S) including the NEEDLE classifier (Sheng et al. 2024 2023arXiv231204968S), 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 2024 Nov 29, using EFOSC2 and Grism 11 (3380-7520A, 16A resolution). Classifications were done using GELATO (Harutyunyan et al. 2008 2008A&A...488..383H), NGSF (Next Generation SuperFit; AstroNote 2022-191, Howell et al. 2005 2005ApJ...634.1190H) 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.

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 2024aasm [ZTF24abrfiya] 23:07:59.860 -08:44:37.09 SN II 0.043 SDSS J230759.88-084437.4 SN redshift from host galaxy H-alpha, H-beta, and [O III] weak emission lines. We note that the SN is ~50 kpc away from the nearby bright galaxy SDSS J230756.58-084409.8, which has a similar redshift of z = 0.047 23:07:59.860 -08:44:37.09 SN II 0.043
TNS 2024acac [GOTO24ikv] 05:36:31.100 -42:18:29.75 CV Balmer H-alpha,H-beta, H-gamma at z~0. It is in the Line of Sight of LEDA 3081025. 05:36:31.100 -42:18:29.75 SN Ia 0.06
TNS 2024acdf [ATLAS24qnh] 03:47:07.969 -59:48:02.84 SN Ia 0.068 WISEA J034707.88-594803.3 0.06 -6 to -2.2 Redshift from host galaxy H-alpha, H-beta, and [O III] emission lines, confirmed by GELATO, and NGSF. Phase from GELATO and DASH. 03:47:07.969 -59:48:02.84 SN Ia 0.068

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