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Spectroscopic Classifications of Optical Transients with the Lick Shane telescope

ATel #11084; D. O. Jones, G. Dimitriadis, Y.-C. Pan, R. J. Foley (UCSC)
on 23 Dec 2017; 01:03 UT
Credential Certification: Yen-Chen Pan (ypan6@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 TNTS and ATLAS. All observations were made on 2017 Dec 22 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name        | IAU Name  | RA (J2000)  | Dec (J2000)  | z     | Type | Phase | Notes
ATLAS17nph | AT2017ivh | 13:39:36.25 | -11:28:55.86 | 0.008 | II | | (1) AT2017ixx | AT2017ixx | 07:14:52.73 | +49:08:15.20 | 0.041 | II | | ATLAS17nsg | AT2017ixz | 07:47:03.03 | +26:46:25.77 | 0.024 | IIb | | (2) ATLAS17nsd | AT2017iye | 10:07:00.81 | -14:15:58.38 | 0.046 | Ia | -1 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 Halpha velocity of -5,400 km/s. (2) We measure an Halpha velocity of -15,000 km/s. (3) We measure an Si II 6355 velocity of -10,000 km/s.