DRAFT
2024-01-16 14:51:28
Type: Object/s-Discovery/Classification
Bibcode: 2024TNSAN..23....1G
ePESSTO+ spectroscopic classification of optical transients
Authors: K. Grzesiak (Warsaw), M. Bronikowski (Nova Gorica), M. Gromadzki (Warsaw), A. Reguitti (INAF-OAB), M. Dennefel (IAP), Stan Barmentloo, J. Sollerman (OKC/SU), S. Benetti (INAF OAPd), J. Anderson (ESO), T.-W. Chen (NCU), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (ICE), M. Nicholl (QUB), O. Yaron (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), K. W. Smith, M. Fulton, M. McCollum, T. Moore, S. Srivastav, 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 one Type Ia, one Type Ib-pec and two Type II's. AT 2023acft shows blue featureless spectrum. AT 2023aclj shows a galaxy spectrum.

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). 

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2024 January 15, using EFOSC2 and Grisms 11 (3380-7520, 13.8A resolution) and 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 2023acft [ATLAS23ybi] 05:15:05.170 -34:24:04.00 Other Spectrum is featureless and shows blue continuum. 05:15:05.170 -34:24:04.00 SLSN-II 0.101
TNS 2023achj [ATLAS23yci] 08:36:07.467 +25:06:47.06 SN II 0.023 KUG 0833+252 0.023 Known host redshift 08:36:07.467 +25:06:47.06 SN II 0.023
TNS 2024aag [ZTF24aacaosi] 13:14:09.251 -05:35:56.26 SN Ib-pec 0.018 MCG-01-34-0132 0.018 Known host redshift 13:14:09.251 -05:35:56.26 SN Ib-pec 0.018
TNS 2023aclj [ZTF23aaaxyeh] 09:52:33.036 +00:59:03.19 Galaxy 0.047 MASX J09523311+0059029 0.047 Known host redshift 09:52:33.036 +00:59:03.19 Galaxy 0.047
TNS 2024yq [ATLAS24asj] 14:07:51.457 -10:03:42.14 SN Ia 0.04 -3 Redshift from SNID 14:07:51.450 -10:03:42.05 SN Ia 0.04
TNS 2024it [ATLAS24agb] 14:47:21.265 -35:45:17.99 SN II 0.04 Redshift from SNID 14:47:21.281 -35:45:17.72 SN II 0.04

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