Spectroscopic Classification of Astrophysical Transients with the Lick Shane Telescope
ATel #17577; R. Kaur, R. J. Foley (UCSC)
on 5 Jan 2026; 23:43 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)
Subjects: Optical, Supernovae
We report the classifications of astrophysical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope obtained on 2025 December 29 UT. The targets were supplied by ALeRCE (through the ZTF data stream) and GOTO. Targets were identified using the target management platform YSE-PZ (Coulter et al., 2023, PASP, 135, 4501). The classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
ZTF25acjmhbr | AT2025ahtw | 08:11:27.97 | -19:18:04.37 | 0.07 | Ia-91T | -5 d |
GOTO25mil | AT2025aiaj | 12:35:08.48 | +28:03:18.95 | 0.0249 | Ia-91T | -10 d | (1)
GOTO25moz | AT2025aigm | 08:37:09.55 | -02:18:05.51 | 0.0525 | Ia | +2 d |
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 a Si II 6355 absorption velocity of -14,000 km/s.
