Spectroscopic Classifications of Optical Transients with the Keck Cosmic Web Imager
ATel #18155; Kishore C. Patra, Ryan J. Foley, Jenna Karcheski (UCSC)
on 13 Nov 2026; 09:32 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 Keck Cosmic Web Imager (KCWI) on the Keck-II telescope. The targets were supplied by ATLAS and LSST. Observations were made on 2026 November 11 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
ATLAS26lnn | AT2026abtz | 06:23:31.519 | +56:56:14.97 | 0.057 | SN Ia | +50 d |
LSST-AP-DO-171141216532430993 | AT2026ahhp | 03:37:05.659 | -27:49:49.07 | 0.11 | SN Ic | +1 d |
ATLAS25pny | AT2025agpz | 04:07:51.557 | -48:42:48.40 | 0.15 | SLSN-II | >300 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.
