DRAFT
2023-04-16 16:29:20
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: T. Kravtsov, T. Pessi (ESO), C. Gutiérrez (UTU), M. Gonzalez-Bañuelos (UAB), 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), 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, J. Weston (QUB), L. Shingles (GSI/QUB), L. Rhodes (Oxford), J. Sommer (LMU/QUB), A. Rest (STScI), C. Stubbs (Harvard)
Source Group: ePESSTO+
Abstract:
This report includes classifications of 2 Type Ia's, 4 Type II's, 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 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 15, 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 2023eqr [ZTF23aaeemik] 15:04:37.184 +10:23:53.26 SN II 0.0336 0.033582 ZTF +11 to +20 Redshift from the host galaxy 15:04:37.178 +10:23:53.11 SN II 0.0336
TNS 2023eqx [ZTF23aaekebt] 18:03:25.773 +21:09:13.58 SN II 0.02 ZTF A few days after max Redshift from spectral match. 18:03:25.778 +21:09:13.42 SN II 0.02
TNS 2023fdj [ATLAS23hlg] 13:56:28.805 -36:33:52.36 SN II 0.0128 0.012779 ATLAS Around max We confirm the classification of the AstroNote 2023-79. 13:56:28.805 -36:33:52.36 SN II 0.0128
TNS 2023fep [ZTF23aaeyqoa] 13:48:24.417 -21:31:50.71 SN Ia 0.066 ZTF Around max We confirm the classification by SCAT, Report No. 14674, and set the redshift to 0.066 based on narrow host lines. 13:48:24.409 -21:31:50.64 SN Ia 0.066
TNS 2023ffg [ZTF23aaeffiu] 16:21:53.143 -25:42:38.88 SN IIb 0.037 ZTF Redshift from the narrow emission lines. Best match to 1993J around max. 16:21:53.143 -25:42:38.88 SN IIb 0.037
TNS 2023ffl [ZTF23aaepnxn] 13:15:13.182 -14:18:14.82 CV 0 ZTF 13:15:13.182 -14:18:14.82 CV
TNS 2023fjy [ZTF23aaeqsve] 15:15:58.368 +15:40:36.38 SN Ia 0.104 0.104135 ZTF Before peak Redshift from the host galaxy. 15:15:58.368 +15:40:36.38 SN Ia 0.104

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