Spectroscopic Classifications of Optical Transients with the Lick Shane telescope
ATel #17225; Kishore C. Patra, Ryan J. Foley (UCSC)
on 6 Jun 2025; 22:03 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 GOTO. Observations were made on 2025 June 06 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
PS25dah | AT2025mmu | 16:00:46.786 | +18:04:50.83 | 0.044 | Ic-BL | -2 d | (1)
GOTO25dhn | AT2025mxn | 23:17:04.666 | +18:35:59.28 | 0.04 | Ia | -6 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) The redshift was determined using narrow emission lines in the spectrum, including H I and [N II].
(2) We measure Si II 6355 and Ca II near-infrared triplet absorption velocities of -14,100 km/s and -18,600 km/s, respectively.
