DRAFT
2025-04-05 19:33:19
Type: Object/s-Discovery/Classification
adH0cc spectroscopic classification of SN 2025fwp
Source Group: adH0cc
Abstract:
We have obtained an optical spectrum of SN 2025fwp, which shows it to be a young Type II supernova. The supernova exploded in the same galaxy as the Type Ia supernova SN 2019ako.
The adH0cc programme for an "accurate determination of H0 with core-collapse supernovae" reports the classification of the optical transient SN 2025fwp. The target was supplied by the ATLAS survey (Tonry et al. 2018, 2018PASP..130f4505T). The observations were performed on the night of 2025 Apr. 04 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.
| 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 | 2025fwp [ATLAS25dcp] | 06:13:56.586 | -38:02:29.07 | SN II | 0.0335 | LEDA 613925 | ATLAS | 14 d | The SN shows broad P Cygni lines of H and He, indicative of a Type II supernova. The redshift was estimated based on the narrow Halpha emission line seen in the spectrum. | 06:13:56.586 | -38:02:29.07 | SN II | 0.0335 |
Comments