Spectroscopic Classifications of Optical Transients with the Lick Shane telescope

ATel #13899; T. Hung (UCSC), J. L. Johnson (SJSU/UCSC), G. Dimitriadis, R. J. Foley (UCSC)
on 28 Jul 2020; 03:15 UT
Credential Certification: Tiara Hung (tiarahung@ucsc.edu)

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We report the following classifications of optical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope. Targets were supplied by ATLAS and ZTF. All observations were made on 2020 Jul 27 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name           | IAU Name  | RA (J2000)  | Dec (J2000)  |   z    | Type  | Phase  | Notes
 
ZTF19aanyuyh   | AT2020pkj | 21:54:23.07 | +15:09:24.41 | 0.025  |  Ia   |  -3 d  | (1) 
ATLAS20tsv     | AT2020pyf | 15:49:50.39 | +27:04:40.13 | 0.073  |  Ia   |  -1 d  | (2) 
ATLAS20ugl     | AT2020qdl | 01:50:43.22 | -21:46:21.11 | 0.020  |  Ia   | -10 d  | (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 an Si II 6355 velocity of -10,400 km/s. The spectrum suffers from host-galaxy extinction. The equivalent width of Na I D is around 4.4 A. (2) We measure an Si II 6355 velocity of -11,100 km/s. (3) We measure an Si II 6355 velocity of -15,000 km/s. The redshift is based on a faint emission line at 6690 A that we assume to be H alpha. The derived redshift is consistent with that from SNID.