Spectroscopic classification of transients with the Lick Shane telescope

ATel #16379; P. Arunachalam, M. J. Bustamante-Rosell, R. J. Foley (UCSC)
on 15 Dec 2023; 01:32 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Maria Jose Bustamante-Rosell (majoburo@gmail.com)

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We report the following classification from spectroscopic observations with the Kast spectrograph on the Shane telescope obtained on 2023 Dec 12 UT. The targets were supplied by the Young Supernova Experiment (YSE), ATLAS and ZTF. The classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name         | IAU Name   | RA (J2000)  | Dec (J2000)  |   z      | Type  | Phase | Notes
 
PS23jxc      | AT2023vyn  | 10:24:50.27 | +43:28:21.09 | 0.081415 |  IIn  | +58d  |  (1) 
PS23fel      | AT2023yky  | 14:03:56.52 | +54:27:24.87 | 0.056    |  Ia   | +50d  |  
ATLAS23wlf   | AT2023yqq  | 22:56:04.95 | +19:34:56.75 | 0.06     |  Ia   |  +5d  |   
PS23lmc      | AT2023yzn  | 01:12:42.06 | +01:08:42.29 | 0.044325 |  II   |  +6d  |  (2) 
ZTF23abshiqq | AT2023zfq  | 06:06:45.10 | -25:02:22.28 | 0.0486   | Other |       |  (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.

We report the following classification from spectroscopic observations with the Kast spectrograph on the Shane telescope obtained on 2023 Dec 12 UT. The targets were supplied by the Young Supernova Experiment (YSE), ATLAS and ZTF. The classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name         | IAU Name   | RA (J2000)  | Dec (J2000)  |   z      | Type  | Phase | Notes
 
PS23jxc      | AT2023vyn  | 10:24:50.27 | +43:28:21.09 | 0.081415 |  IIn  | +58d  |  (1) 
PS23fel      | AT2023yky  | 14:03:56.52 | +54:27:24.87 | 0.056    |  Ia   | +50d  |  
ATLAS23wlf   | AT2023yqq  | 22:56:04.95 | +19:34:56.75 | 0.06     |  Ia   |  +5d  |   
PS23lmc      | AT2023yzn  | 01:12:42.06 | +01:08:42.29 | 0.044325 |  II   |  +6d  |  (2) 
ZTF23abshiqq | AT2023zfq  | 06:06:45.10 | -25:02:22.28 | 0.0486   | Other |       |  (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 a H-alpha FWHM of 5,000 km/s. This transient was previously classified as a "SN" by Schweinfurth et al. (AstroNote 2023-310). (2) We measure an H-alpha P-Cygni velocity of -14,000 km/s. (3) We detect a blue featureless continuum with weak, narrow H alpha and [O III] 5007 at z = 0.0486, which we consider to be from the host galaxy. We caution that at this redshift, H alpha is coincident with the telluric B band.

(1) We measure a H-alpha FWHM of 5,000 km/s. This transient was previously classified as a "SN" by Schweinfurth et al. (AstroNote 2023-310). (2) We measure an H-alpha P-Cygni velocity of -14,000 km/s. (3) We detect a blue featureless continuum with weak, narrow H alpha and [O III] 5007 at z = 0.0486, which we consider to be from the host galaxy. We caution that at this redshift, H alpha is coincident with the telluric B band.