Spectroscopic classification of transients with the Lick Shane telescope

ATel #17208; P. Arunachalam, R. J. Foley (UCSC)
on 27 May 2025; 21:46 UT
Credential Certification: Prasiddha Arunachalam (parunach@ucsc.edu)

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We report the following classification from spectroscopic observations with the Kast spectrograph on the Shane telescope obtained on 2025 May 18 UT. The targets were supplied by ALeRCE, from the ZTF data stream, and GOTO. Targets were selected for follow-up observations 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
 
ZTF25aapdivq | AT2025ixf | 16:12:23.805 | +35:10:25.28 | 0.0624 |   Ia    |  +7   | (1)  
GOTO25bvh    | AT2025hlf | 12:23:57.243 | +08:45:47.63 | 0.0732 |   II    |   -   |  
GOTO25chj    | AT2025jqx | 13:00:01.667 | +28:25:28.71 | 0.0833 |   SN    |   -   | (2) 

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) Using the reported host redshift, we measure a Si II 6355 velocity of -9500 km/s. (2) The spectrum shows a blue continuum with no strong spectral features.