Spectroscopic Classifications of Optical Transients with the Lick Shane telescope

ATel #10996; G. Dimitriadis, C. Rojas-Bravo, D. K. Reed, Y.-C. Pan, R. J. Foley (UCSC)
on 23 Nov 2017; 07:34 UT
Credential Certification: Yen-Chen Pan (ypan6@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 ASAS-SN and ATLAS. All observations were made on 2017 Nov 22 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name        | IAU Name  | RA (J2000)  | Dec (J2000)  | z     | Type | Phase | Notes
 
ATLAS17nan  | AT2017hyf | 02:09:33.02 | +21:14:56.84 | 0.017 |  Ib  |  +8 d | 
ATLAS17ncr  | AT2017hzc | 20:50:07.52 | +05:59:08.92 | 0.048 |  Ia  |  +6 d | (1) 
ATLAS17ndw  | AT2017icw | 02:24:35.35 | -11:45:01.72 | 0.075 |  Ia  |  +3 d | (2) 
ATLAS17nek  | AT2017iez | 01:33:13.24 | -17:31:31.71 | 0.046 |  Ia  |  -1 d | (3) 
ATLAS17nfs  | AT2017ihl | 10:48:49.53 | -04:16:13.94 | 0.081 |  Ia  | +15 d | 
ASASSN-17pl | AT2017ijw | 21:13:53.00 | +02:13:14.00 | 0.047 |  Ia  |  +3 d | (4) 

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 -9,600 km/s. We also detect Na D lines with EW = 1.5 A at the host-galaxy redshift and EW = 2.0 A at z = 0. (2) We measure an Si II 6355 velocity of -10,700 km/s. (3) We measure an Si II 6355 velocity of -11,500 km/s. (4) We measure an Si II 6355 velocity of -9,800 km/s. We also detect Na D lines with EW = 2.3 A at the host-galaxy redshift and EW = 2.2 A at z = 0.