DRAFT
2024-02-13 17:44:24
Type: Object/s-Discovery/Classification
Bibcode: 2024TNSAN..49....1G
GOTO-FAST spectroscopic classifications of optical transients
Authors: B. Godson, M. Pursiainen, B. Warwick, M. J. Dyer, M. Mitchell, D. O'Neill, J. Lyman, T. Killestein, A. Sahu, A. Kumar, D. Coppejans, G. Ramsay, R. Kotak, B.Gompertz, K. Ackley, Ulaczyk, F. Jiminez-Ibarra, D. Steeghs, D. K. Galloway, V. Dhillon, P. O'Brien, K. Noysena, R. P. Breton, L. K. Nuttall, E. Pall'e, D. Pollacco on behalf of GOTO
Source Group: GOTO
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 2 Type Ia's and 2 Type IIs including the nearby flash ionised SN 2024cld (see https://www.wis-tns.org/astronotes/astronote/2024-48).

GOTO-FAST (astronote-2023-224) reports the classifications of the following optical transients. The observations were obtained on the Isaac Newton Telescope (INT) on the night of 2024 Feb 12 using the IDS spectrograph with R150V grating (3950-7900 Å, R ~600). The transients were classified using SNID (Blondin & Tonry 2007).

Targets were  supplied by the Gravitational-wave Optical Transient Observer GOTO (Steeghs et al. 2022), the Zwicky Transient Facility ZTF (Bellm et al. 2019) - data stream processed through the Lasair broker (Smith, Williams, Young et al. 2019) and by the ALeRCE broker (Forster et al. 2020)

The classified objects are listed below in the Related Objects Table.

 
Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Source Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2024ccf [ZTF20aclpdmt] 05:30:27.413 -13:50:00.20 SN Ia 0.045 Matches to type Ia at approximately +6d post peak with z=0.045 using SNID. 05:30:27.413 -13:50:00.20 SN Ia 0.045
TNS 2024bzx [ZTF24aaejwkz] 12:42:50.744 +20:41:13.35 SN Ia 0.063 Matches to type Ia at peak with z=0.063 using SNID. 12:42:50.745 +20:41:13.08 SN Ia 0.063
TNS 2024cdt [ZTF24aaekclg] 15:20:42.902 +49:06:26.47 SN II 0.04 Noisy spectrum but broad balmer features visible. Matches to young pre-peak type II at z~0.04 using SNID. 15:20:42.890 +49:06:26.42 SN II 0.04
TNS 2024cld [GOTO24ql] 15:50:21.608 +18:56:21.07 SN II 0.014 NGC 6004 0.01277 Shows clear flash ionisation features such as narrow Balmer lines and He II 4686A. Matches type II SN at z=0.014 using SNID. 15:50:21.550 +18:56:20.22 SN II 0.014

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