Spectroscopic Classifications of Optical Transients with the Lick Shane telescope

ATel #12585; G. Dimitriadis, R. J. Foley (UCSC)
on 16 Mar 2019; 21:01 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 ASAS-SN, ATLAS and ZTF. All observations were made on 2019 Mar 16 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name         | IAU Name  | RA (J2000)  | Dec (J2000)  |   z   | Type  | Phase  | Notes
 
ASASSN-19et  | AT2019bnc | 13:31:28.27 | +25:12:11.12 | 0.045 |  Ia   | +10 d  | (1) 
ASASSN-19ew  | AT2019bpc | 12:34:43.78 | +46:57:31.63 | 0.024 |  Ia   |  -7 d  | (2) 
ATLAS19dxy   | AT2019btk | 10:43:26.60 | +00:59:43.96 | 0.074 |  II   |        | (3) 
ASASSN-19gl  | AT2019btp | 17:43:26.10 | +05:38:19.03 | 0.042 |  Ia   |  -2 d  | (4) 
ZTF19aamhhey | AT2019bum | 14:49:47.78 | +54:48:46.89 | 0.045 |  Ia   | -10 d  | (5) 

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 -11,800 km/s. (2) Good fits with SN 1999aa-like spectra a week before maximum. We measure an Si II 6355 velocity of -11,100 km/s. (3) Low signal-to-noise spectrum, with visible P-Cygni hydrogen profile. We measure an H-alpha velocity of -14,600 km/s. (4) Good fits with SN 1991T-like and SN 1999aa-like spectra a few days before maximum. We measure an Si II 6355 velocity of -10,800 km/s. Our classifications agrees with the FTN / FLOYDS-N spectrum from the Global SN Project. (5) Good fits with SN 1991T-like spectra several days before maximum. We measure an Si II 6355 velocity of -10,300 km/s.