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) 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 January 08, 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 | 2020aeth [ZTF20acyyavb] | 11:41:28.413 | -02:15:03.19 | SN Ia | 0.048 | SDSS J114128.12-021502.7 | 0.0480665 | ZTF | +4 to +7 | Consistent with the classification reported in the TNS Classification Report No. 8512. Redshift reported from host. | 11:41:28.410 | -02:15:03.28 | SN Ia | 0.048 |
TNS | 2021hq [ZTF21aaafzwx] | 07:31:26.045 | +05:32:56.08 | SN Ia | 0.08 | WISEA J073126.04+053256.1 | ZTF | -7 to -4 | Redshift acquired from SNID template match as there is no known host redshift. | 07:31:26.045 | +05:32:56.08 | SN Ia | 0.08 | |
TNS | 2021ia [ZTF21aabgpub] | 11:34:40.607 | -21:03:22.68 | Other | 2M 1134-2103 | ZTF | Transient was difficult to distinguish from quasar Image-A during observations. Spectrum is dominated by light from Quasar. Unable to deduce a classification. | 11:34:40.607 | -21:03:22.68 | |||||
TNS | 2021jj [ATLAS21abw] | 13:17:24.348 | -16:27:35.01 | SN Ia | 0.02 | 2MASX J13172425-1627312 | ATLAS | -7 to -4 | Redshift acquired from SNID template match as there is no known redshift. | 13:17:24.349 | -16:27:35.20 | SN Ia | 0.02 | |
TNS | 2021nm [ATLAS21anq] | 12:46:39.357 | -37:56:46.32 | SN Ia | 0.054 | WISEA J124639.35-375647.0 | ATLAS | -3 to +3 | Narrow H-alpha from host implies a redshift of z = 0.054. | 12:46:39.357 | -37:56:46.32 | SN Ia | 0.054 | |
TNS | 2021nx [ATLAS21arg] | 02:37:13.231 | -27:30:57.47 | SN II | 0.058 | 2MASX J02371337-2730570 | ATLAS | -7 to -4 | Spectrum shows narrow Balmer emission features and a reasonable match to SN2006bc. H-alpha emission implies a redshift of z = 0.058. | 02:37:13.231 | -27:30:57.47 | SN II | 0.058 | |
TNS | 2021ok [ATLAS21asi] | 05:31:31.528 | -20:31:14.65 | SN II | ATLAS | Spectrum resembles a featureless blue continuum with a bump at ~5100A. Redshift is unclear. | 05:31:31.522 | -20:31:14.51 | SN II | |||||
TNS | 2021os [ZTF21aabygea] | 12:02:54.082 | +05:36:53.15 | SN II | 0.019 | CGCG 041-027 | 0.019323 | ZTF | -7 to -4 | Redshift reported from host. | 12:02:54.070 | +05:36:53.17 | SN II | 0.019 |
TNS | 2021pp [ZTF21aaahzpr] | 11:49:11.607 | -02:17:11.20 | SN Ia | 0.09 | SDSS J114911.57-021711.6 | ZTF | -3 to +3 | Spectrum matches well with super-chandra sn06gz around peak, but is not as bright: M_g = -19.2 from ZTF lightcurve. Also possible to obtain reasonable matches with Type Ia-91T and normal Type Ia. Redshift acquired from SNID template match as there is no known host redshift. | 11:49:11.600 | -02:17:11.36 | SN Ia | 0.09 | |
TNS | 2021qv [ZTF21aabyifm] | 12:29:38.942 | +09:29:50.53 | SN Ib/c | 0.024 | VCC 1206 | 0.024514 | ZTF | -7 to -4 | Redshift reported from host. | 12:29:38.936 | +09:29:50.51 | SN Ib/c | 0.024 |