DRAFT
2024-01-09 15:59:23
Type: Object/s-Discovery/Classification
Bibcode: 2024TNSAN..11....1P
ePESSTO+ spectroscopic classification of optical transients
Authors: T. Petrushevska (Nova Gorica), N. Ihanec (Warsaw,ING), M. Gromadzki (Warsaw), C. Gutierrez (IEEC/ICE-CSIC), X. Sheng (QUB), T. Killestein (UTU), S. Benetti (INAF OAPd), I. Arcavi (Tel Aviv), J. Sollerman (OKC/SU), S. Srivastav (QUB), 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, 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, three Type IIn's and one Bowen Fluorescence Flare.

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 8, 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 2023xob [ZTF23abqimmw] 01:44:47.047 +16:01:04.75 SN IIn 0.105 Redshift found by measuring narrow emission lines 01:44:47.047 +16:01:04.75 SN IIn 0.105
TNS 2023zgo [ZTF23abqkwzr] 08:48:54.899 +31:47:00.82 AGN 0.232 SDSS J084854.88+314700.6 0.233 The spectrum shows a blue continuum and N III + He II emission features associated with the Bowen fluorescence mechanism. Such spectral features are typical of Bowen Fluoresce Flares (BFFs; e.g. Trakhtenbrot et al. 2019). 08:48:54.899 +31:47:00.82 AGN 0.232
TNS 2024C [ATLAS24aaj] 09:43:54.124 -29:43:38.68 SN IIn 0.052 Redshift found by measuring narrow emission lines 09:43:54.120 -29:43:38.93 SN IIn 0.052
TNS 2024dy [ATLAS24ada] 10:46:45.030 +29:54:33.80 SN IIn 0.021 Redshift found by measuring narrow emission lines. Spectrum shows HeII flash feature at 4686A. Classification in agreement with ZTF, TNS Classification Report No. 16369 10:46:45.030 +29:54:33.80 SN IIn 0.021
TNS 2024hm [ATLAS24afl] 03:24:06.521 -38:43:59.42 SN Ia 0.067 2MASS 03240512-3844200 0.067 -1 Known host redshift, consistent with SNID match. 03:24:06.521 -38:43:59.42 SN Ia 0.067
TNS 2024ka [ATLAS24ahk] 12:04:09.756 +01:49:33.87 SN Ib 0.017 CGCG 013-056 0.017 Known host redshift (consistent with narrow Halpha line). 12:04:09.773 +01:49:33.66 SN Ib 0.017

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