DRAFT
2024-06-01 16:05:18
Type: Object/s-Discovery/Classification
Bibcode: 2024TNSAN.145....1V
ePESSTO+ spectroscopic classification of optical transients
Authors: C. Vassallo, K. Matilainen, T. Kravtsov, T. Killestein, H. Kuncarayakti, N. Koivisto (Turku), A. Reguitti (INAF-OAB), L. Galbany (IEEC), T. Petrushevska (Nova Gorica), J. Anderson (ESO), T.-W. Chen (NCU), 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, 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 five SNe Ia, two SNe II, one SN IIb, one SN Ia 91T-like, two SN and one red continuum source.

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), and the Gravitational-wave Optical Transient Observer GOTO (see Dyer et al. 2020, SPIE, 11445 2020SPIE11445E..7GD).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2024 May 31, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) and NGSF (Next Generation SuperFit; AstroNote 2022-191, Howell et al. 2005 2005ApJ...634.1190H).

We confirm the classification of SN2024gep as a Ia-pec, as reported in Hueichapan et al. 2024 (AstroNote 2024-110)

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 2024igi [ZTF22aajicks] 13:57:23.822 -06:53:19.15 Galaxy 0.0306 Redshift from host 13:57:23.822 -06:53:19.15 Galaxy 0.0306
TNS 2024iyy [ZTF24aaoaega] 17:50:47.989 +06:02:29.57 SN II 0.0203 Z 55-21 0.0203 Redshift from host. Strong host contamination, light curve shows marked plateau. 17:50:47.997 +06:02:29.64 SN II 0.0203
TNS 2024jaw [GOTO24btz] 15:01:44.444 -28:01:44.36 SN Ia 0.04 Redshift from template matching 15:01:44.432 -28:01:44.26 SN Ia 0.04
TNS 2024jcf [ATLAS24hkl] 21:10:56.250 -46:01:47.41 SN IIb 0.04 Redshift from template matching, shows good matches to SNe IIb and 1987A-like SNe. 21:10:56.250 -46:01:47.41 SN IIb 0.04
TNS 2024jcx [ATLAS24hkw] 00:45:23.145 -33:30:05.74 Other Red continuum 00:45:23.145 -33:30:05.74
TNS 2024jcz [ATLAS24hla] 20:32:33.254 -11:48:04.59 SN II 0.06 Redshift from template matching 20:32:33.285 -11:48:04.30 SN II 0.06
TNS 2024jgk [ATLAS24hqd] 14:17:59.565 +16:44:07.42 SN 0.019 Blue continuum, redshift from host 14:17:59.550 +16:44:07.44 SN II 0.0188
TNS 2024jhm [ATLAS24hrt] 11:25:44.000 +14:40:26.25 SN Ia 0.04 Redshift from template matching 11:25:43.990 +14:40:26.08 SN Ia 0.04
TNS 2024jin [ZTF24aaoxbth] 15:58:21.853 -13:09:00.98 SN Ia 0.08 Redshift from template matching 15:58:21.851 -13:09:00.87 SN Ia 0.08
TNS 2024jvm [ATLAS24hvy] 11:20:10.350 -03:03:04.51 SN 0.0257 Redshift from host 11:20:10.353 -03:03:04.49 SN 0.0257
TNS 2024jxh [ZTF24aapgvir] 20:06:39.100 +04:55:41.07 CV 0 Balmer absorption at z=0 20:06:39.100 +04:55:41.07 CV
TNS 2024jyb [ZTF24aaowdbj] 14:41:54.893 +16:29:01.74 SN Ia 0.11 SDSS J144154.99+162901.7 0.1086876 Redshift from template matching 14:41:54.879 +16:29:01.64 SN Ia 0.11
TNS 2024jyc [ZTF24aaovuub] 14:46:41.720 -00:50:53.62 SN Ia 0.13 SDSS J144641.55-005052.0 Redshift from template matching 14:46:41.724 -00:50:53.53 SN Ia 0.13
TNS 2024jxk [ZTF24aaotqjy] 16:54:55.245 +03:10:50.76 SN Ia 0.08 Redshift from template matching 16:54:55.245 +03:10:50.76 SN Ia 0.08
TNS 2024gep [ATLAS24foi] 14:28:35.521 -37:35:39.39 SN Ia-pec 0.012 Redshift from template matching to 91bg-likes. 14:28:35.521 -37:35:39.39 SN Ia-pec 0.012

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