DRAFT
2021-01-16 18:16:41
Type: Object/s-Discovery/Classification
Bibcode: 2021TNSAN..19....1L
adH0cc spectroscopic classification of SN 2021abi
Source Group: adH0cc
Abstract:
We have obtained an optical spectrum of SN 2021abi, which shows it to be a normal Type Ia supernova a few days before maximum light, at a redshift z~0.07.
The adH0cc programme for an "accurate determination of H0 with core-collapse supernovae" reports the classification of the optical transient SN 2021abi. The target was supplied by the Zwicky Transient Facility ZTF (Kulkarni 2018, 2018ATel11266....1K) and the ATLAS survey (Tonry et al. 2018, 2018PASP..130f4505T). The observations were performed on the night of 2021 January 15 with the ESO Very Large Telescope UT1, equipped with the FORS2 spectrograph and grism 300V, covering a wavelength range from 3400 to 9600 Å at a resolution of 10 Å. The classification was done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B).
| 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 | 2021abi [ZTF21aacvrzy] | 04:50:08.507 | -03:17:01.52 | SN Ia | 0.07 | anonymous | ZTF, ATLAS | -5d | The spectrum is similar to those of several normal Type Ia supernovae a few days before B-band maximum. SNID identifies SN 2003du around day -5 as the best match. A redshift z~0.07 is estimated from the SNID crossmatches. | 04:50:08.488 | -03:17:01.12 | SN Ia | 0.07 |
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