Spectroscopic Classifications of Astrophysical Transients with Keck I + LRIS

ATel #16478; K. W. Davis, P. Arunachalam, R. J. Foley (UCSC), L. A. Kwok (Rutgers)
on 23 Feb 2024; 21:19 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)

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We report the following the classifications of astrophysical transients from spectroscopic observations with the LRIS spectrograph on the Keck I telescope, made on 2024 Feb 14 UT. The targets were supplied by YSE, ATLAS, and ZTF, and identified 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
 
PS23azz      | AT2023dyp | 13:12:58.023 | +23:22:51.35 |  0.020  |     II     | +300d |  (1) 
ATLAS24api   | AT2024uj  | 11:07:49.060 | -20:01:34.25 |  0.013  | Ib-Ca-rich | +20d  |  (2) 
ZTF24aacjuqr | AT2024atp | 03:47:42.075 | +08:39:57.09 |  0.03   |   Ia-pec   | +15d  |  (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 4000 km/s. (2) We find good matches to SN 2019ehk (Jacobson-Galan et al., 2020) at ~3 weeks post-maximum. (3) We find good matches to SN 2002es (Ganeshalingam et al., 2012)and iPTF2014atg (Cao et al., 2015) at ~2 weeks post-maximum.