DRAFT
2026-05-16 16:01:50
Type: Object/s-Discovery/Classification
Bibcode: 2026TNSAN.137....1Q
ePESSTO+ spectroscopic classification of optical transients
Authors: J. Quirola-Vásquez (Radboud), J. Khaulsay (Cardiff), C. Aster (Cardiff), M. Dennefeld (Sorbonne), N. Ihanec (ING), G. Pignata (Tarapaca) G. Corcoran (UCD), J. Anderson (ESO), T.-W. Chen (NCU), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (Trinity), P. Pessi (Warsaw), O. Yaron (Weizmann), D. Young (QUB), J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt, K. W. Smith (Oxford/QUB), S. Srivastav, H. Stevance (Oxford), D. R. Young, M. Fulton, M. McCollum, T. Moore, M. Nicholl, J. Weston (QUB), L. Shingles (GSI/QUB), L. Rhodes (Oxford), J. Sommer (LMU/QUB), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard)
Source Group: ePESSTO+
Keywords: Astronomical Databases, Spectroscopy, Transient, Supernova, Optical
Abstract:
This report includes classifications of 1 Type Ia,1 Type II, 1 Type Ia-91T-like, 1 AGN and 3 CV'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 2020PASP..132h5002S), the Zwicky Transient Facility ZTF (Bellm et al. 2019 2019PASP..131a8002B) - data stream processed through the Lasair broker (Williams et al. 2024 2024RASTI...3..362W) and by the ALeRCE broker (Forster et al. 2020 2021AJ....161..242F), the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014 2014ApJ...788...48S), the Gravitational-wave Optical Transient Observer GOTO (see Dyer et al. 2020, SPIE, 11445 2020SPIE11445E..7GD) and by the ESA Gaia Photometric Science Alerts Team DPAC.

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2026 May 15, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution) and Grism 11 (3345-7470, 14A resolution). Classifications were done using SNID-SAGE (Stoppa F., Smartt S.~J., 2026, arXiv, arXiv:2603.28741. doi:10.48550/arXiv.2603.28741), 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 Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2021jbt [ATLAS21mge] 14:50:57.410 -28:56:19.21 AGN 0.07 14505739-2856192 Redshift provided from template best match. Also seen as a flare by WISE AND eROSITA 14:50:57.410 -28:56:19.21 AGN 0.07
TNS 2026lru [ASASSN-26df] 10:23:49.418 -20:57:25.38 SN Ia 0.026 MCG -03-27-007 0.026332 Redshift from host galaxy. 10:23:49.563 -20:57:29.52 SN Ia 0.026
TNS 2026mbj [ZTF26aavrsod] 16:11:41.710 -24:03:58.63 CV 0 16:11:41.710 -24:03:58.63 CV
TNS 2026mhn [DCAP69] 16:44:31.651 -27:15:18.38 CV 0 16:44:31.651 -27:15:18.38 CV
TNS 2026mlf [ATLAS26foj] 13:01:56.482 -31:45:10.71 SN Ia-91T-like 0.052 S6LP000034 0.052 Redshift from host lines (and in agreement with the template best match) 13:01:56.482 -31:45:10.71 SN Ia-91T-like 0.052
TNS 2026mqo [ATLAS26fpm] 13:32:50.969 -27:03:10.45 SN II 0.038 2MASXJ13325052-2703118 0.038 Redshift from host galaxy. 13:32:50.941 -27:03:10.45 SN II 0.038
TNS 2026mrk [ZTF26aavlqbu] 17:23:31.800 -22:46:29.24 CV 0 4111643768155693824 17:23:31.807 -22:46:29.24 CV

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