Spectroscopic Classifications of Optical Transients with the Lick Shane telescope

ATel #12759; J. S. Brown, G. Dimitriadis, R. J. Foley (UCSC)
on 14 May 2019; 21:33 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 ATLAS, ZTF and ASAS-SN. Observations were made on 2019 May 13 and 14 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name         | IAU Name  | RA (J2000)  | Dec (J2000)  |   z   | Type  | Phase | Notes
 
ATLAS19kmt   | AT2019fcp | 07:37:43.61 | +59:18:49.98 | 0.039 |  Ia   | -1 d  | (1) 
ATLAS19kky   | AT2019fbv | 12:54:31.90 | +35:17:50.42 | 0.028 |  II   | young | (2) 
ZTF19aaugaam | AT2019evh | 13:20:18.96 | +08:10:49.39 | 0.050 |  II   |       | (3) 
ASASSN-19mm  | AT2019fcr | 13:33:19.38 | +41:12:56.74 | 0.027 |  Ia   | -7 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) Spectrum acquired on 2019 May 14 UT. We measure an Si II 6355 velocity of -11,200 km/s. (2) Spectrum acquired on 2019 May 14 UT. The spectrum has a blue continuum with weak, broad H-alpha emission, consistent with a young core-collapse SN. We measure an H-alpha velocity of -6,300 km/s. Our classification agrees with the spectrum from UH88/SNIFS on TNS (classification report 4068). (3) Spectrum acquired on 2019 May 13 UT. The spectrum has a nearly featureless blue continuum, with H-alpha emission with FWHM ~ 1000 km/s at the redshift of the host galaxy. (4) Spectrum acquired on 2019 May 14 UT. We measure an Si II 6355 velocity of -10,000 km/s.