DRAFT
2023-04-17 15:00:40
Type: Object/s-Discovery/Classification
Bibcode: 2023TNSAN..87....1K
ePESSTO+ spectroscopic classification of optical transients
Authors: T . Kravtsov, T. Pessi (ESO), T. Müller-Bravo (ICE-CSIC), T. Moore (QUB), L. Galbany (ICE/IEEC), N. Ihanec (Warsaw), S. Benetti (INAF - OAPd), J. Anderson (ESO), T.-W. Chen (TUM/MPA), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (ICE), M. Nicholl (QUB), O. Yaron (Weizmann), D. Young (QUB)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
Abstract: This report includes classifications of 4 Type Ia's and 2 Type II's. 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 2020arXiv200309052S), 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...3a..26S) and by the ALeRCE broker (Forster et al. 2020 https://arxiv.org/abs/2008.03303).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2023 April 16, using EFOSC2 and Grism 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).

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 2023avq [ATLAS23bwv] 18:56:19.780 -68:34:18.23 SN II 0.014 IC 4789 0.0141167 ATLAS Redshift from host galaxy (SIMBAD). The light curve has risen for over 30 days, so this transient might be SN 1987A-like 18:56:19.780 -68:34:18.23 SN II 0.014
TNS 2023elg [ATLAS23evd] 15:47:03.920 -11:45:17.14 SN Ia 0.056 ATLAS few days after peak 15:47:03.920 -11:45:17.14 SN Ia 0.056
TNS 2023eso [ZTF23aaelwoi] 09:56:59.901 -25:24:11.55 SN Ia 0.064 ZTF few days after peak 09:56:59.904 -25:24:11.49 SN Ia 0.064
TNS 2023euh [ZTF23aaencty] 16:41:18.043 +26:44:34.63 SN Ia 0.064 ZTF few days after peak 16:41:18.045 +26:44:34.50 SN Ia 0.064
TNS 2023eui [ZTF23aaenctz] 16:41:08.657 +26:55:58.14 SN Ia 0.079 ZTF few days after peak 16:41:08.650 +26:55:58.15 SN Ia 0.079
TNS 2023ftg [ATLAS23hyg] 18:08:11.483 +11:43:09.88 SN II 0.02 IC 4688 0.020084 ATLAS Redshift from host galaxy (SIMBAD). The spectrum shows H-beta (but no H-alpha) and the light curve has a quick rise, suggesting a SN II. 18:08:11.483 +11:43:09.88 SN II 0.02

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