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 Pan-STARRS Survey for Transients (Chambers et al. 2016 2016arXiv161205560C), the ATLAS survey (Smith et al. 2020 2020arXiv200309052S) 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...3a..26S) and by the ALeRCE broker (Forster et al. 2020 https://arxiv.org/abs/2008.03303).
Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2021 November 24, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) and GELATO (Harutyunyan et al. 2008 2008A&A...488..383H) and Superfit (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.
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 | 2021acya | 04:02:13.757 | -28:23:29.68 | SN IIn | 0.063 | ATLAS | At maximum | At z=0.063 the transient has a peak magnidude ~-20.6 mag, in the SLSN regime. He II is also present, as in early Type II spectra showing high-ionization features. Redshift derived from Gelato/SNID template fitting. | 04:02:13.760 | -28:23:29.72 | SN IIn | 0.063 | ||
TNS | 2021adcw | 02:04:32.880 | -21:07:09.50 | SN II | 0.017 | ATLAS, ZTF | Around maximum | Redshift derived from narrow host emission lines | 02:04:32.891 | -21:07:09.52 | SN II | 0.017 | ||
TNS | 2021aefa | 05:48:06.624 | -17:32:09.21 | SN Ia | 0.11 | ATLAS, ZTF, PS | +5 | Redshift derived from Gelato/SNID template fitting | 05:48:06.617 | -17:32:09.32 | SN Ia | 0.11 | ||
TNS | 2021aekt | 05:14:57.858 | -44:15:18.24 | SN Ia | 0.052 | ATLAS | -2 | Redshift derived from narrow host emission lines | 05:14:57.858 | -44:15:18.24 | SN Ia | 0.052 | ||
TNS | 2021aexp | 01:38:11.964 | -29:42:04.38 | SN Ia | 0.07 | GALEXASCJ013811.96-294205.1 | ATLAS, ZTF, PS | +1 | Redshift derived from Gelato/SNID template fitting | 01:38:11.964 | -29:42:04.38 | SN Ia | 0.07 | |
TNS | 2021aexy | 03:15:53.847 | -23:02:41.36 | SN Ia | 0.039 | Orphan | ATLAS, ZTF, PS1 | at maximum | Already classified as a Type Ia (TNS Classification Report No. 11433), we confirm the classification | 03:15:53.845 | -23:02:41.31 | SN Ia | 0.039 | |
TNS | 2021afdu | 00:08:43.248 | -39:52:40.06 | SN Ia | 0.064 | 2MASXJ00084328-3952404 | 0.058344 | ATLAS | -10 | Redshift derived from Gelato/SNID template fitting | 00:08:43.248 | -39:52:40.06 | SN Ia | 0.064 |
TNS | 2021aebs | 01:24:25.700 | +19:01:19.95 | SN II | 0.036 | ATLAS, PS1 | +15 (expl) | See 2021TNSCR3871. Redshift derived from Gelato/SNID template fitting | 01:24:25.700 | +19:01:19.85 | SN II | 0.036 | ||
TNS | 2021aekz | 03:34:15.514 | -41:28:26.56 | SN Ia | 0.062 | ATLAS | +12 | Redshift derived from narrow host emission lines | 03:34:15.514 | -41:28:26.56 | SN Ia | 0.062 |