Spectroscopic Classification of Astrophysical Transients with the Lick Shane Telescope
ATel #17169; K. W. Davis, R. J. Foley (UCSC)
on 7 May 2025; 00:41 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)
Subjects: Optical, Supernovae, Variables
We report the classifications of astrophysical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope obtained on 2025 May 06 UT. The targets were supplied by XOSS, YSE, and ZTF. 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
ZTF25aanxgnn | AT2025igf | 16:24:04.795 | +28:59:04.86 | 0.06 | Ia | peak | (1)
PS25bss | AT2025imm | 11:06:24.930 | +45:30:45.25 | 0.064 | Ia-91bg | peak |
KATS25J001 | AT2025jpj | 18:47:34.990 | +29:05:57.90 | | CV | |
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. We note an error in our quick-look spectral reduction, where our wavelength solutions blueward of 5500 A may be incorrect by up to 20 A. This error also creates an artifact at ~5500 A where the blue and red channels are combined.
(1) We measure a Si II 6355 velocity of -10,000 km/s.
