Spectroscopic Classification of Optical Transients with the Lick Shane telescope
ATel #16989; K. Taggart, R. J. Foley (UCSC)
on 21 Jan 2025; 22:54 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Kirsty Taggart (k.taggart@ucsc.edu)
Subjects: Optical, Supernovae
We report the following classifications of optical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope. The targets were supplied by the Young Supernova Experiment and BlackGEM. All observations were made on 2025 Jan 20 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name |IAU Name| RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
PS25bk | 2025ie | 02:29:35.41 | -22:11:15.91 | 0.0566 | Ia | +2 | 1)
BGEMJ032209.37-185224.3| 2025bu | 03:22:09.36 | -18:52:24.59 | 0.0254 | II | | 2)
Notes:
When the redshift is given to 2 decimal places, it is derived from the SN spectrum. Otherwise, the redshift is determined from the host galaxy.
1) We measure an Si 6355 velocity of -10,700 km/s.
2) The absorption minimum of the P-Cygni H-alpha line is -11,700 km/s.