Spectroscopic Classifications of Optical Transients with the Lick Shane telescope

ATel #13251; C. Rojas-Bravo, G. Dimitriadis, R. J. Foley (UCSC)
on 31 Oct 2019; 18:19 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Georgios Dimitriadis (gdimitri@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 the ALeRCe team using the ZTF data stream, ATLAS, and ASAS-SN. All observations were made on 2019 Oct 30 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name         | IAU Name   | RA (J2000)  | Dec (J2000)  |   z   | Type  |   Phase   | Notes
 
ATLAS19yhh   | AT 2019spk | 10:02:54.40 | -06:12:25.99 | 0.01  |  II   | post-peak |  (1) 
ZTF19achaspq | AT 2019tdf | 17:46:28.98 | +30:42:24.81 | 0.016 |  Ia   |   -7 d    |  (2) 
ASASSN-19zu  | AT 2019tiz | 03:34:50.82 | -02:49:48.29 | 0.038 |  Ia   |   +5 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) The transient is associated with WISEA J100255.22-061226.8, a dwarf irregular galaxy (also known as LEDA 166103). Assuming a redshift of 0.012 (from the GLADE catalog), we measure an H-alpha velocity of -4,700 km/s. (2) We measure an Si II 6355 velocity of -14,200 km/s. (3) Reddened SN Ia, associated with 2MASX J03345106-0249486, with no catalog redshift information. We identify NaID (EW = 2.4 A) and Ca HK absorption lines at z = 0.038. We measure an Si II 6355 velocity of -10,200 km/s.