Spectroscopic Classification of optical transients with the Lick Shane telescope

ATel #16178; K. Taggart, R. J. Foley (UCSC)
on 10 Aug 2023; 00:34 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)

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We report the following classification from a spectroscopic observation with the Kast spectrograph on the Lick Shane telescope. The targets were supplied by the Young Supernova Experiment, ASAS-SN, GOTO and ZTF. The observations were made on 2023 Aug 09 UT. The classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name        | IAU Name| RA (J2000)  | Dec (J2000)  |   z    | Type | Phase | Notes 
ZTF23aavaaox| 2023ocm | 16:08:06.51 | +25:29:06.05 | 0.042  |  Ia  | -3    | (1) 
ASASSN-23ge | 2023ojf | 00:13:45.677| -26:20:03.08 | 0.03   |  Ia  | +14   | (2)      
PS23gah     | 2023omp | 14:15:30.85 | +52:53:44.09 | 0.0654 |  Ia  | -3    | (3) 
GOTO23vp    | 2023oun | 04:53:13.703| +63:10:10.25 | 0.0197 |  Ia  | -7    | (4) 

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 spectrum is very red. We measure a Na D EW of -2.9 A. We measure a Si II 6355 absorption velocity of -11,400 km/s. (2) The best fighting template matches are of type Ia, but there are some reasonable matches to SNe Ib. We note that at z ~ 0.03, the SN peaked at < -20 mag. (3) We measure a Si II 6355 absorption velocity of -11,500 km/s. (4) We measure a Si II 6355 absorption velocity of -12,700 km/s.