Spectroscopic Classifications of Optical Transients with the Lick Shane telescope
ATel #17267; Kishore C. Patra, Ryan J. Foley (UCSC)
on 4 Jul 2025; 06:50 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Kishore Patra (kcpatra@ucsc.edu)
Subjects: Optical, Supernovae, Transient
We report the following classifications of optical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope. The targets were supplied by Young Supernova Experiment and Zwicky Transient Facility. Observations were made on 2025 July 03 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
PS25dmn | AT2025npf | 14:29:30.81 | +02:46:23.69 | 0.091 | Ia | 7 d | (1)
ZTF25aawterb | AT2025oum | 22:38:43.49 | -14:33:00.29 | 0.104 | Ia-91T | -2 d | (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 Si II 6355 velocity of -11,000 km/s.
(2) We measure Si II 6355 velocity of -9,700 km/s. The redshift was determined using narrow emission lines from the host galaxy.
