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 April 15, 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 | 2021ixi [ZTF21aauapli] | 17:31:15.729 | +05:26:22.41 | SN Ia-91T-like | 0.02 | WISEA J173116.20+052625.4 | ZTF | –10 to –8 | Young 91T-like SN Ia. Redshift estimated from SNID and GELATO crossmatches. | 17:31:15.726 | +05:26:22.41 | SN Ia-91T-like | 0.02 | |
| TNS | 2021jbh [ATLAS21mbw] | 13:15:15.572 | -35:10:15.53 | ATLAS | Very low-S/N spectrum. The object has faded significantly compared to the ATLAS detection on 2021 April 11. | 13:15:15.572 | -35:10:15.53 | |||||||
| TNS | 2021jbk [ATLAS21mcf] | 13:45:08.104 | -44:29:29.22 | SN Ib | 0.05 | ATLAS | at max | GELATO and SNID yield good matches with SNe Ib around peak. Among the best matches is the peculiar SN Ib 2005bf. Redshift from SNID and GELATO crossmatches. | 13:45:08.104 | -44:29:29.22 | SN Ib | 0.05 | ||
| TNS | 2021jbn [ATLAS21mdo] | 13:58:31.575 | -31:06:45.61 | SN Ia | 0.08 | ATLAS | at max | SNID and GELATO yield good matches with normal or 91T-like SNe Ia about 3d before peak. Redshift estimated from the SNID and GELATO crossmatches. | 13:58:31.575 | -31:06:45.61 | SN Ia | 0.08 | ||
| TNS | 2021jmi [ATLAS21mij] | 15:28:41.310 | +26:09:19.31 | SN Ia | 0.086 | WISEA J152841.68+260917.1 | 0.08648 | ATLAS | at max | Normal SN Ia at maximum. Redshift from known host. | 15:28:41.310 | +26:09:19.31 | SN Ia | 0.086 |
| TNS | 2021iso [ZTF21aatpsky] | 11:57:21.464 | -20:13:58.62 | SN II | 0.031 | WISEA J115721.52-201404.1 | ZTF, ATLAS | +8 to +10 | Based on a featureless blue continuum, SN 2021iso was previously classified as a SN without specifying the type (AstroNote 2021-116). A new spectrum shows broad H Balmer and He I lines, leading to this re-classification as a SN II. | 11:57:21.460 | -20:13:58.56 | SN II | 0.031 |
Comments