Spectroscopic Classifications of Optical Transients with the Lick Shane 3-m telescope

ATel #12041; G. Dimitriadis, C. Rojas-Bravo, R. Case, R. J. Foley (UCSC)
on 16 Sep 2018; 05:17 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 ZTF and ATLAS. All observations were made on 2018 Sep 15 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name         | IAU Name  | RA (J2000)  | Dec (J2000)  |   z   | Type | Phase  | Notes
 
ZTF18absnqyo | AT2018fvw | 21:02:20.23 | +19:57:46.25 | 0.04  |  Ia  |  +9 d  | (1) 
ATLAS18uxc   | AT2018gdg | 00:30:24.63 | -01:15:50.88 | 0.057 |  Ia  |  -5 d  | (2) 
ZTF18abuhzfc | AT2018ggx | 01:04:38.80 | -04:15:29.42 | 0.038 |  Ia  |  +3 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 -9,800 km/s. We also detect Na D lines with EW = 2.9 A at the host-galaxy redshift. (2) We measure an Si II 6355 velocity of -11,100 km/s. (3) We measure an Si II 6355 velocity of -10,000 km/s. We also detect Na D lines with EW = 3.3 A at the host-galaxy redshift.