DRAFT
2025-01-13 14:53:10
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN...5....1A
ePESSTO+ spectroscopic classification of optical transients
Authors: B. Ayala, M. Ramirez, R. Dastidar (UNAB), A. Kumar (RHUL/Warwick), L. Galbany (CSIC), T. Kravtsov (UTU), I. Arcavi (TAU), J. Sollerman (Stockholm), Gonzalez-Banuelos, M., Gutiérrez, C. (IEEC/ICE-CSIC), E. Zimmerman (Weizmann), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), M. Nicholl (QUB), O. Yaron (Weizmann), D. Young (QUB), P. Pessi (Stockholm), 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. McCollum, T. Moore, J. Weston (QUB), L. Shingles (GSI/QUB), L. Rhodes (Oxford), J. Sommer (LMU/QUB), A. Rest (STScI), C. Stubbs (Harvard), X. Sheng, A. Aamer, C. R. Angus, D. Magill (QUB), P. Ramsden (QUB/Birmingham)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 1 Type Ia and 1 SLSN-II. We encourage follow-up 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) and 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 2025 January 06, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B).

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 2024agld [ATLAS25aco] 01:13:51.246 -31:47:30.01 SN Ia 0.02 NGC 0441 0.0188 -8 Redshift from NED. 01:13:51.246 -31:47:30.01 SN Ia 0.02
TNS 2024adtg [ZTF24abvftmi] 08:53:28.451 -11:08:26.89 SLSN-II 0.32 Around peak Redshift from host galaxy emission lines. Blue featureless spectrum. An absolute magnitude of around -22.5. See also initial AstroNote: 2024-389. 08:53:28.451 -11:08:26.89 SLSN-II 0.32

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