DRAFT
2024-04-07 19:26:57
Type: Object/s-Discovery/Classification
Bibcode: 2024TNSAN..94....1K
AT2024fkm - Spectroscopic classification as a type IIb supernova from Keck/LRIS
Source Group: ZTF
Keywords: Supernova
Abstract:
We report the spectroscopic classification of the fast-fading transient AT2024fkm as a type IIb supernova.
We observed the fast-fading transient AT2024fkm / ZTF24aaifosg / ATLAS 24evb (Astronotes 2024-92, 2024-93) with the Low Resolution Imaging Spectrometer (LRIS, Oke et al. 95) on the Keck I telescope, with observations beginning at UTC 2024-04-07 15:31:17. We took two 1200s blue exposures, and four 600s red exposures. These data were reduced with lpipe (Perley et al. 2019).
The spectrum shows broad features of hydrogen with P-cygni line profiles at z=0.041, consistent with the redshift of the host galaxy UGC 08802. Cross-matches to supernova templates using SNID (Blondin & Tonry 2007), show that the spectrum closely resembles the type IIb SN 1993J at a phase of 2 days before peak (see attached plot).
| 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 | 2024fkm | 13:53:08.541 | +35:43:13.78 | SN IIb | 0.041 | 13:53:08.564 | +35:43:14.38 | SN IIb | 0.04113 |
| File | Comments |
|---|---|
 Skärmavbild 2024-04-07 kl. 20.29.15.png |
