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Spectroscopic Classifications of Optical Transients with Keck/LRIS

ATel #13313; M. R. Siebert, G. Dimitriadis, R. J. Foley (UCSC)
on 26 Nov 2019; 16:31 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Matthew Siebert (msiebert@ucsc.edu)

Subjects: Optical, Supernovae

We report the following classifications of optical transients from spectroscopic observations with the LRIS spectrograph on the Keck I telescope. Targets were supplied by the ALeRCE using the public ZTF stream, ASASSN and ATLAS. All observations were made on 2019 November 26 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name           | IAU Name  | RA (J2000)  | Dec (J2000)  |   z   | Type  | Phase  | Notes
ZTF19actldas | AT2019vdg | 06:23:31.94 | +50:23:59.95 | 0.04 | Ia | peak | (1) ASASSN-19abq | AT2019vnj | 11:09:01.27 | -14:38:09.96 | 0.02 | Ia | -3d | (2) ATLAS19bavv | AT2019voo | 12:19:42.52 | -12:13:32.16 | 0.013 | Ia | +25d |

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 Si II 6355 velocity of -11,400 km/s. (2) We measure an Si II 6355 velocity of -11,300 km/s.