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 2020arXiv200309052S), 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), the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014 2014ApJ...788...48S), the PMO-Tsinghua Transient Survey PTSS, 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 2020 November 9th, 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 | Remarks | TNS RA | TNS DEC | TNS Obj-Type | TNS Redshift |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TNS | 2020yzn [ASASSN-20nt] | 19:33:22.303 | -58:07:21.36 | SN Ia-91bg-like | 0.016 | ESO 142- G 019 | 0.014643 | Redshift measured with SNID | 19:33:22.330 | -58:07:22.26 | SN Ia-91bg-like | 0.016 |
| TNS | 2020zam [ATLAS20bfbd] | 21:34:42.466 | -45:27:23.18 | SN Ia | 0.11 | Redshift measured with SNID | 21:34:42.466 | -45:27:23.18 | SN Ia | 0.11 | ||
| TNS | 2020ytk [ZTF20acorjop] | 00:55:22.257 | -10:05:48.21 | SN II | 0.058 | SDSS J005522.28-100546.6 | 0.489 | Redshift measured from SNID | 00:55:22.260 | -10:05:48.25 | SN II | 0.058 |
| TNS | 2020yxl [ZTF20acoojba] | 02:57:46.536 | -20:43:15.75 | SN Ia | 0.117 | Redshift measured with SNID | 02:57:46.550 | -20:43:15.54 | SN Ia | 0.117 | ||
| TNS | 2020yzy [ATLAS20bezb] | 03:42:44.727 | -36:56:03.53 | Very low signal to noise spectrum shows only a faint blue continuum with no apparent features. Unknown classification. | 03:42:44.727 | -36:56:03.53 | ||||||
| TNS | 2020yxk [ATLAS20bfac] | 00:48:26.803 | -03:43:48.72 | SN II | 0.13 | Redshift measured using SNID, Blue continuum with possible weak broad features, consistent with a SN II at z=0.13. Possible orphan | 00:48:26.812 | -03:43:48.67 | SN II | 0.13 | ||
| TNS | 2020zbf [ATLAS20bfee] | 01:58:01.671 | -41:20:51.84 | SLSN-I | 0.35 | Redshift measured using SNID. Transient risen by about 1 mag in 20 days, consistent with slow-evolving SLSN around peak | 01:58:01.671 | -41:20:51.84 | SLSN-I | 0.195 | ||
| TNS | 2020ysi [ZTF20acnvprg] | 07:48:47.165 | +15:37:31.92 | SN Ia | 0.108 | Redshift measured using SNID | 07:48:47.165 | +15:37:31.92 | SN Ia | 0.108 | ||
| TNS | 2020zbg [ATLAS20bfeq] | 02:56:01.683 | -35:15:57.50 | SN Ia | 0.104 | Redshift measured with SNID | 02:56:01.683 | -35:15:57.50 | SN Ia | 0.104 | ||
| TNS | 2020yjv [Gaia20ezt] | 10:40:21.260 | -36:24:42.26 | SN II | 0.009256 | Redshift measured using SNID. Spectra consistent with Type II SN during Nebular phase | 10:40:21.260 | -36:24:42.26 | SN II | 0.009 | ||
| TNS | 2020zbl [GSNST-20dc] | 03:42:38.668 | +15:38:29.51 | 2MASX J03423918+1538365 | 0.03128 | Not seen in 60s acquisition image | 03:42:38.668 | +15:38:29.51 | ||||
| TNS | 2020yzr [GSNST-20da] | 02:23:51.170 | +21:21:44.20 | Unknown | Not seen in 60s acquisition image | 02:23:51.170 | +21:21:44.20 |
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