DRAFT
2024-11-11 16:19:33
Type: Object/s-Discovery/Classification
Bibcode: 2024TNSAN.331....1S
ePESSTO+ spectroscopic classification of optical transients
Authors: A. Singh, A. Gangopadhyay, A. Gkini, P.J. Pessi, Y. Hu, K. Tsalapatas, J. Sollerman (Stockholm), L. Galbany (ICE-CSIC), S.Srivastav (Oxford), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), O. Yaron (Weizmann), D. Young (QUB), S. Benetti (INAF), E. Zimmerman (Weizmann), Asaf Horowicz (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, D. R. Young, 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 5 Type Ia (including 2 91T-like) and 1 Type IIb supernovae. 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 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), the Gravitational-wave Optical Transient Observer GOTO (see Dyer et al. 2020, SPIE, 11445 2020SPIE11445E..7GD) and by the ESA Gaia Photometric Science Alerts Team DPAC.

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2024 Nov 10, using EFOSC2 and Grism 13 (3985-9315A, 18A 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.

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 2024yok [GOTO24hcr] 21:30:36.230 -43:09:01.44 SN IIb 0.01677 NGC 7072 0.0165 NGSF yields a best match with SN 2011dh, a IIb at the redshift of the host NGC 7072. We confirm the classification reported earlier (TNS Classification Report No. 18637). 21:30:36.230 -43:09:01.44 SN IIb 0.01677
TNS 2024aaqn [GOTO24ica] 02:36:34.068 -41:52:29.42 SN Ia-91T-like 0.048 WISEA J023634.02-415229.9 0.048 Best match with SNID and NGSF yields a Type Ia-91T-like at the host redshift of 0.048 02:36:34.068 -41:52:29.42 SN Ia-91T-like 0.048
TNS 2024aatr [ATLAS24qcj] 10:10:29.200 +03:46:00.24 SN Ia 0.03 SDSS J101029.63+034613.1 Best match with SNID and NGSF yields a Type Ia at an estimated redshift of 0.03. Our classification is consistent with the previous classification based on SNIascore (TNS Classification Report No. 18640). 10:10:29.207 +03:46:00.21 SN Ia 0.03
TNS 2024zqr [ATLAS24pyn] 01:00:59.521 -67:33:06.90 SN Ia 0.06 LEDA 143872 Best match with SNID yields a Type Ia at an estimated redshift of 0.06 which is consistent with the photometric redshift of the host. 01:00:59.521 -67:33:06.90 SN Ia 0.06
TNS 2024zvu [ATLAS24pwb] 03:18:11.449 -45:30:46.85 SN Ia 0.07 WISEA J031811.45-453046.7 Best match with SNID and NGSF yields a Type Ia at an estimated redshift of 0.07 03:18:11.449 -45:30:46.85 SN Ia 0.07
TNS 2024aarv [ZTF24abrnllc] 05:40:59.016 -26:19:30.24 SN Ia-91T-like 0.038 ESO 487- G 032 0.038 Best match using NGSF and SNID yields a Ia-91T-like at the host redshift of 0.038. 05:40:59.020 -26:19:30.22 SN Ia-91T-like 0.038

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