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), 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), the ESA Gaia Photometric Science Alerts Team DPAC and by the Brazilian Transient Search team.
Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2021 April 16, using EFOSC2 and Grism 13 (3985-9315Å, 18Å resolution). Classifications were done using SNID (Blondin & Tonry 2007; 2007ApJ...666.1024B) and GELATO (Harutyunyan et al. 2008; 2008A&A...488..383H).
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 | Remarks | TNS RA | TNS DEC | TNS Obj-Type | TNS Redshift |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TNS | 2021iyz [Gaia21bto] | 07:29:05.640 | +00:36:22.50 | CV | 0 | Gaia, ZTF | Blue continuum with narrow H alpha emission at z = 0. | 07:29:05.640 | +00:36:22.50 | CV | ||||
| TNS | 2021ife [BraTS-SON-T2-024] | 12:22:05.280 | -19:37:15.90 | CV | 0 | BraTS, ZTF | Blue continuum with narrow P Cygni features. The most prominent line is at 5876 Å, consistent with He I at z = 0. Most likely this is an AM CVn outburst. | 12:22:05.280 | -19:37:15.90 | CV | ||||
| TNS | 2021jvs [ZTF21aavqphe] | 14:57:44.807 | +06:37:27.67 | SN Ia | 0.021 | UGC 09625 | 0.02147 | ZTF | < –10 | Young SN Ia. Known host redshift from SDSS. | 14:57:44.805 | +06:37:27.77 | SN Ia | 0.021 |
| TNS | 2021jwl [ZTF21aavhlry] | 15:35:34.270 | +05:23:32.08 | SN Ia | 0.038 | WISEA J153534.43+052335.0 | 0.03839 | ZTF | –10 to –8 | Young SN Ia. Known host redshift. | 15:35:34.263 | +05:23:32.02 | SN Ia | 0.038 |
| TNS | 2021iue [ATLAS21lpv] | 15:11:38.853 | +15:20:51.22 | SN Ia | 0.09 | SDSS J151138.58+152047.5 | ATLAS, ZTF | at max | Redshift from SNID crossmatches. | 15:11:38.865 | +15:20:51.32 | SN Ia | 0.09 | |
| TNS | 2021jtz [ATLAS21mtv] | 10:34:39.648 | -38:47:39.24 | SN Ia | 0.1 | ATLAS | –7 to –4 | Redshift from SNID crossmatches. | 10:34:39.648 | -38:47:39.24 | SN Ia | 0.1 | ||
| TNS | 2021gba [PS21bxj] | 14:37:03.884 | -08:04:35.19 | SN Ia | 0.1 | PS1, ZTF, ATLAS | +11 to +20 | Redshift from SNID crossmatches. | 14:37:03.895 | -08:04:35.06 | SN Ia | 0.1 | ||
| TNS | 2021juw [Gaia21bwh] | 19:47:05.210 | -20:12:11.52 | SN Ia | 0.039 | ESO 594-16 | 0.03949 | Gaia | > +20 | SN Ia about 3 weeks after maximum. Known host redshift. | 19:47:05.210 | -20:12:11.52 | SN Ia | 0.039 |
| TNS | 2021jbi [ATLAS21mbz] | 13:18:39.030 | -41:15:12.07 | SN IIn | 0.14 | ATLAS | > +20 | Matches with SNe IIn and Ia-CSM. Redshift from intermediate-width Balmer emission lines in the SN spectrum. The ATLAS light curve suggests that the object is about 3 weeks after explosion. | 13:18:39.030 | -41:15:12.07 | SN IIn | 0.14 |
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