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Spectroscopic Classifications of Optical Transients with the Lick Shane telescope

ATel #11230; G. Dimitriadis, D. A Coulter, Y.-C. Pan, R. J. Foley (UCSC)
on 26 Jan 2018; 01:25 UT
Credential Certification: Georgios Dimitriadis (gdimitri@ucsc.edu)

Subjects: Optical, Supernovae

We report the following classifications of optical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope. Targets were supplied by POSS and ATLAS. All observations were made on 2018 Jan 24 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name        | IAU Name | RA (J2000)  | Dec (J2000)  | z     | Type | Phase | Notes
AT2018ka | AT2018ka | 10:52:11.20 | +58:26:24.60 | 0.032 | Ia | +1 d | (1) ATLAS18ecc | AT2018kc | 10:30:58.44 | +23:47:18.25 | 0.064 | Ia | +0 d | (2) ATLAS18ecf | AT2018kd | 04:51:06.29 | -20:33:18.72 | 0.067 | Ia | +7 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 -12,900 km/s. The SN is heavily reddened and we detect Na D lines with EW = 4.0 A at the host-galaxy redshift. (2) We measure an Si II 6355 velocity of -12,000 km/s. (3) We measure an Si II 6355 velocity of -10,600 km/s.