Spectroscopic Classification of Astrophysical Transients with the Lick Shane Telescope

ATel #17902; R. Kaur, J. Karcheski, R. J. Foley (UCSC), T. Dass, C. O. Maitland-Lewis, J. V. Mortensen (UCSC/Thacher)
on 16 Jul 2026; 22:30 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)

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We report the classifications of astrophysical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope obtained on 2026 July 16 UT. The targets were supplied by 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
 
PS21ivo      | AT2026ptu  | 16:07:48.16  | +39:11:37.64 |  0.0379 |  II   | +17d  | (1) 
PS26ejb      | AT2026ryw  | 14:14:46.31  | +53:28:46.48 |  0.0749 |  Ia   | -3d   | (2) 
ZTF26abfqjst | AT2026uvw  | 20:59:01.35  | -16:08:34.68 |  0.11   |  Ia   | +1d   | 

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 H-alpha absorption velocity of -7,700 km/s. (2) We measure a Si II absorption velocity of -12,800 km/s.