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Spectroscopic Classifications of Optical Transients with Keck II

ATel #10285; R. J. Foley, C. N. Leibler, D. A. Coulter (UCSC)
on 19 Apr 2017; 05:43 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)

Subjects: Optical, Cataclysmic Variable, Supernovae

We report the following classifications of optical transients from spectroscopic observations with the Echellette Spectrograph and Imager (ESI) on the Keck II telescope. Targets were supplied by PTSS and Gaia. All observations were made on 2017 April 17 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name       | IAU Name  | RA (J2000)  | Dec (J2000) | z    | Type | Phase   |  Notes
Gaia17avd | AT2017cop | 21:24:03.41 | +15:01:19.2 | 0.03 | Ia | +30 | PTSS-17opl | AT2017dac | 18:58:11.11 | +46:27:55.1 | 0 | CV | | (1)

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 H-alpha profile is double peaked with peaks at -300 and +650 km/s and FWHMs of 800 and 600 km/s, respectively. This implies that the system is viewed close to edge on. The FWZI for the feature is 2000 km/s.