DRAFT
2024-01-10 15:59:49
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: N. Ihanec (Warsaw,ING), T. Petrushevska (Nova Gorica), M. Gromadzki (Warsaw), C. Gutierrez (IEEC/ICE-CSIC), X. Sheng (QUB), T. Killestein (UTU), 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+
Abstract:
This report includes classifications of one Type Ia, two Type II's. AT 2024uj is a young transient (last non-detection two days ago), showing blue continuum without apparent features. 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 BlackGEM survey.

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2024 January 9, 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 2023acbr [ZTF23abvommm] 02:27:03.193 -09:25:02.40 SN II 0.016 SDSS J022702-092512.8 0.016 Known host redshift 02:27:03.193 -09:25:02.40 SN II 0.016
TNS 2024hy [ZTF24aaakprs] 13:02:03.491 +01:08:05.39 SN Ia 0.086 SDSS J130203.54+010806.2 0.086 Known host redshift 13:02:03.482 +01:08:05.17 SN Ia 0.086
TNS 2024qc [BGEM J103650.69-260923.7] 10:36:50.705 -26:09:23.72 SN II 0.012 S58Q000325 0.012 Known host redshift 10:36:50.710 -26:09:23.76 SN II 0.012
TNS 2024uj [ATLAS24api] 11:07:49.040 -20:01:34.22 Other 0.013 NGC 3566 0.013 Known host redshift 11:07:49.060 -20:01:34.25 SN Ib-Ca-rich 0.013

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