Spectroscopic Classifications of Optical Transients with the Lick Shane telescope

ATel #15821; S. Tinyanont, K. Taggart, R. J. Foley (UCSC)
on 21 Dec 2022; 23:36 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Kirsty Taggart (k.taggart@ucsc.edu)

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We report the following classifications of optical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope. The targets were supplied by the Young Supernova Experiment, the ALeRCE broker using the ZTF data stream, and ZTF itself. All observations were made on 2022 Dec 21 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name         | IAU Name | RA (J2000)   | Dec (J2000)  |   z    | Type  | Phase | Notes 
ZTF22abyrvsz | 2022aczs | 02:05:19.83  | -23:41:53.39 | 0.0304 |  II   |       | (1) 
ZTF22abyszwg | 2022adbb | 09:43:59.17  | +42:37:58.85 | 0.0184 |  Ia   | -3    | (2) 
PS22mrz      | 2022adby | 03:39:11.24  | -18:21:52.17 | 0.0917 |  Ia   | -6    | (3) 

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 an H-alpha absorption velocity of -14,000 km/s (2) We measure an Si II 6355 velocity of -11,600 km/s. We note a strong Na I D absorption at the redshift of the host galaxy with EW = 2.78 A. (3) We measure an Si II 6355 velocity of -12,300 km/s